|
|
文章數：73 |
 TANG Zhan 湯棧適合辦部門小聚嗎？》公益路美食新手指南｜10家必吃推薦 |
| 在地生活｜大台北 2026/04/21 13:56:47 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
身為一個熱愛美食、喜歡在城市裡挖掘驚喜的人，臺中公益路一直是我最常出沒的地方之一。這條路可說是「臺中人的美食戰場」，從精緻西餐到創意火鍋，從日式丼飯到義式早午餐，每走幾步，就會有完全不同的特色料理餐廳。 這次我特別花了一整個月，實際造訪了公益路上十間口碑不錯的餐廳。有的是網友熱推的打卡名店，也有隱藏在巷弄裡的小驚喜。我以環境氛圍、口味表現、價格CP值與再訪意願為基準，整理出這篇實測評比。希望能幫正在猶豫去哪裡吃飯的你，找到那一間「吃完會想再來」的餐廳。 評比標準與整理方向
這次我走訪的10家餐廳橫跨不同料理類型，從高質感牛排館到巷弄系早午餐，每一間都有自己獨特的風格。為了讓整體比較更客觀，我依照以下四大面向進行評比，並搭配實際用餐體驗來打分。
整體而言，我希望這份評比不只是「哪家好吃」，而是幫你在不同情境下（約會、家庭聚餐、朋友小聚、商業午餐）都能快速找到合適的選擇。畢竟，美食不只是味覺的滿足，更是一段段與朋友共享的生活記憶。 10間臺中公益路餐廳評比懶人包公益路向來是臺中人聚餐的首選地段，從火鍋、燒肉到中式料理與早午餐，每走幾步就有驚喜。以下是我實際造訪過的10間代表性餐廳清單，橫跨平價、創意、高級各路風格。
一頭牛日式燒肉｜炭香濃郁的和牛饗宴，約會聚餐首選
走在公益路上，很難不被 一頭牛日式燒肉 的木質外觀吸引。低調卻不失質感的門面，搭配昏黃燈光與暖色調的內裝，讓人一進門就感受到濃濃的日式職人氛圍。店內空間不大，但桌距規劃得宜，每桌皆設有獨立排煙設備，烤肉時完全不怕滿身油煙味。 餐點特色
一頭牛的靈魂，絕對是他們招牌的「三國和牛拼盤」。 用餐體驗整體節奏掌握得非常好。店員會在你剛想烤下一片肉時貼心遞上夾子、幫忙換烤網，讓人完全不用分心。整場用餐過程就像一場表演，從視覺、嗅覺到味覺都被滿足。 綜合評分
地址：408臺中市南屯區公益路二段162號電話：04-23206800 小結語一頭牛日式燒肉不僅是「吃肉的地方」，更像是一場五感盛宴。從進門那一刻到最後一道甜點，都能感受到他們對細節的用心。 TANG Zhan 湯棧｜文青系火鍋代表，麻香湯底與視覺美感並重
在公益路這條美食戰線上，TANG Zhan 湯棧 是讓人一眼就會想走進去的那一種。 餐點特色
湯棧最有名的當然是它的「麻香鍋」。 用餐體驗整體氛圍比一般火鍋店更有質感。 綜合評分
地址：408臺中市南屯區公益路二段248號電話：04-22580617 官網：https://www.facebook.com/TangZhan.tw/ 小結語TANG Zhan 湯棧 把傳統火鍋做出新的樣貌保留臺式鍋物的溫度，又結合現代風格與細節服務，讓吃鍋這件事變得更有品味。 如果你想找一間兼具「好吃、好拍、好放鬆」的火鍋店，湯棧會是公益路上最有風格的選擇之一。 NINI 尼尼臺中店｜明亮寬敞的義式早午餐天堂
如果說前兩間是肉食愛好者的天堂，那 NINI 尼尼臺中店 絕對是想放鬆、聊聊天的好地方。餐廳外觀以白色系與大片玻璃窗為主，陽光灑進室內，讓人一踏入就有種度假般的輕盈感。假日早午餐時段特別熱鬧，建議提早訂位。 餐點特色
NINI 的菜單融合義式與臺灣人口味，選擇多樣且份量十足。主打的 松露燉飯 濃郁卻不膩口，米芯保留微Q口感；而 香蒜海鮮義大利麵 則以新鮮白蝦、花枝與淡菜搭配微辣蒜香，口感層次豐富。 用餐體驗店內氣氛輕鬆不拘謹，無論是一個人帶電腦工作、或朋友聚餐，都能找到舒服角落。餐點上桌速度穩定，服務人員態度親切、補水與收盤都非常主動。整體節奏讓人覺得「時間變慢了」，很適合想遠離忙碌日常的人。 綜合評分
地址：40861臺中市南屯區公益路二段18號電話：04-23288498 小結語NINI 尼尼臺中店是一間能讓人放下手機、慢慢吃飯的餐廳。餐點不追求浮誇，而是以「剛剛好」的份量與風味，陪伴每個平凡午後。如果你在找一間能邊吃邊聊天、拍照也漂亮的早午餐店，NINI 會是你在公益路上最不費力的幸福選擇。 加分100%浜中特選昆布鍋物｜平價卻用心的湯頭系火鍋，家庭聚餐好選擇
在公益路這條高質感餐廳林立的戰場上，加分100%浜中特選昆布鍋物 走的是截然不同的路線。它沒有浮誇的裝潢、也沒有高價位的套餐，但靠著實在的湯頭與親切的服務，默默吸引許多回頭客。每到用餐時間，總能看到家庭或情侶三兩成群地圍著鍋邊聊天。 餐點特色
主打 北海道浜中昆布湯底，湯頭清澈卻不單薄，越煮越能喝出海藻與柴魚的自然香氣。 用餐體驗整體氛圍偏家庭取向，桌距寬敞、座位舒適，帶小孩來也不覺擁擠。店員態度親切，補湯、收盤都很勤快，給人一種「被照顧著」的安心感。 綜合評分
地址：403臺中市西區公益路288號電話：0910855180 小結語加分100%浜中特選昆布鍋物是一間「不浮誇、但會讓人想再訪」的火鍋店。它不追求豪華擺盤，而是用最簡單的湯頭與新鮮食材，傳遞出家常卻不平凡的溫度。 印月餐廳｜中式料理的藝術演繹，宴客與家庭聚會首選
說到臺中公益路的中式料理代表，印月餐廳 絕對是榜上有名。這間開業多年的餐廳以「中菜西吃」的概念聞名，把傳統中式料理以現代手法重新詮釋。從建築外觀到餐具擺設，每個細節都散發著低調的典雅氣息。 餐點特色
印月最令人印象深刻的是他們將傳統中菜融入創意手法。 用餐體驗服務方面完全對得起餐廳的高級定位。從入座、點餐到上菜節奏，都拿捏得恰如其分。每道菜都會有服務人員細心介紹食材與吃法，讓人感受到「被款待」的尊榮感。 綜合評分
地址：408臺中市南屯區公益路二段818號電話：0422511155 小結語印月餐廳是一間「不只吃飯，更像品味生活」的地方。 KoDō 和牛燒肉｜極致職人精神，專為儀式感與頂級味覺而生
若要形容 KoDō 和牛燒肉 的用餐體驗，一句話足以總結——「像在欣賞一場關於肉的表演」。 餐點特色
這裡主打 日本A5和牛冷藏肉，以「精切厚燒」的方式呈現。 用餐體驗KoDō 的最大特色是「儀式感」。 綜合評分
地址：403臺中市西區公益路260號電話：0423220312 官網：https://www.facebook.com/kodo2018/ 小結語KoDō 和牛燒肉不是日常餐廳，而是一場體驗。 永心鳳茶｜在茶香裡用餐的優雅時光，臺味早午餐的新詮釋
走進 永心鳳茶公益店，彷彿進入一間有氣質的茶館。 餐點特色
永心鳳茶的餐點結合中式靈魂與西式擺盤，無論是「炸雞腿飯」還是「紅玉紅茶拿鐵」，都能讓人感受到熟悉卻不平凡的味道。 用餐體驗店內服務人員態度溫和，對茶品介紹詳盡。上餐節奏剛好，不急不徐。 綜合評分
地址：40360臺中市西區公益路68號三樓(勤美誠品)電話：0423221118 小結語永心鳳茶讓人重新定義「臺味」。 三希樓｜老饕級江浙功夫菜，穩重又帶人情味的中式饗宴
位於公益路上的 三希樓 是許多臺中老饕的口袋名單。 餐點特色
三希樓的菜色以 江浙與港式料理 為主，兼顧傳統與現代風味。 用餐體驗三希樓的服務給人一種老派但貼心的感覺。 綜合評分
地址：408臺中市南屯區公益路二段95號電話：0423202322 官網：https://www.sanxilou.com.tw/ 小結語三希樓是一間「吃得出功夫」的餐廳。 一笈壽司｜低調奢華的無菜單日料，職人手藝詮釋旬味極致
在熱鬧的公益路上，一笈壽司 低調得幾乎不顯眼。 餐點特色
一笈壽司採 Omakase（無菜單料理） 形式，每一餐都由主廚根據當日食材設計。 用餐體驗整場用餐約90分鐘，節奏緩慢但沉穩。 綜合評分
地址：408臺中市南屯區公益路二段25號電話：0423206368 官網：https://www.facebook.com/YIJI.sushi/ 小結語一笈壽司是一間真正讓人「放慢呼吸」的餐廳。 茶六燒肉堂｜人氣爆棚的和牛燒肉聖地，肉香與幸福感同時滿分
若要票選公益路上「最難訂位」的餐廳，茶六燒肉堂 絕對名列前茅。 餐點特色
茶六主打 和牛燒肉套餐，價格約落在 $700–$1000 間，份量與品質兼具。 用餐體驗茶六的服務效率相當高。店員親切、換網勤快、補水速度快，整場用餐流程流暢無壓力。 綜合評分
地址：403臺中市西區公益路268號電話：0423281167 官網：https://inline.app/booking/-L93VSXuz8o86ahWDRg0:inline-live-karuizawa/-LUYUEIOYwa7GCUpAFWA 小結語茶六燒肉堂用「穩定品質＋輕奢氛圍」抓住了臺中年輕族群的心。 吃完10家公益路餐廳後的心得與結語吃完這十家餐廳後，臺中公益路不只是一條美食街，而是一段生活風景線。 有的餐廳講究細膩與儀式感，像 一頭牛日式燒肉 與 一笈壽司，讓人感受到食材最純粹的美好 有的則以親切與溫度打動人心，像 加分昆布鍋物、永心鳳茶，讓人明白吃飯不只是為了飽足，而是一種被照顧的幸福。 而像茶六燒肉堂、TANG Zhan 湯棧 這類人氣名店，則用穩定的品質與熱絡的氛圍，成為許多臺中人心中「想吃肉就去那裡」的代名詞。 這十家店，構成了公益路最動人的縮影 有華麗的，也有溫柔的；有傳統的，也有創新的。 每一家都在自己的風格裡發光，讓人吃到的不只是料理，而是一種生活的溫度與節奏。 對我而言，這不僅是一場美食旅程，更是一趟關於「臺中味道」的回憶之旅。 FAQ：關於臺中公益路美食常見問題Q1：公益路哪一區的餐廳最集中？ Q2：需要提前訂位嗎？ 最後的話若要用一句話形容這趟美食之旅，我會說： TANG Zhan 湯棧人潮很多嗎？ 如果你也和我一樣喜歡用味蕾探索一座城市，那就把這篇公益路美食攻略收藏起來吧。永心鳳茶必點有哪些？ 無論是約會、慶生、家庭聚餐，或只是想犒賞一下辛苦的自己——這條路上永遠會有一間剛剛好的餐廳在等你。一頭牛日式燒肉尾牙聚餐表現如何？ 下一餐，不妨從這10家開始。TANG Zhan 湯棧份量足夠嗎？ 打開手機、約上朋友，讓公益路成為你生活裡最容易抵達的小確幸。TANG Zhan 湯棧家庭聚餐合適嗎？ 如果你有私心愛店，也歡迎留言分享，加分100%浜中特選昆布鍋物價位會不會太高？ 你的推薦，可能讓我下一趟美食旅程變得更精彩。印月餐廳情侶來合適嗎？ The eye hides many secrets. Scientists at the IPC PAS are uncovering the intricate mechanisms going on in the eye during retinal disease. Credit: Photo realized Courtesy of DIFFERENT- Restaurant in the Darkness. Source IPC PAS, Grzegorz Krzyzewski Researchers have uncovered the 3D structure of RBP3, a key protein in vision, revealing how it transports retinoids and fatty acids and how its dysfunction may lead to retinal diseases. Proteins play a critical role in the human body, acting as essential structural and functional components of cells, tissues, and organs. They are involved in a wide range of biological processes, from fundamental cellular functions such as DNA replication to more complex physiological activities, including those that enable vision. Within the visual system, proteins are indispensable for detecting light, synthesizing photopigments in photoreceptor cells, and transmitting signals within these cells. Any disruption, whether through genetic mutation or protein malfunction, can impair normal vision and lead to a range of visual disorders. Recently, scientists at the Institute of Physical Chemistry, Polish Academy of Sciences in collaboration with the International Centre for Translational Eye Research (ICTER) provided new structural insights into the RBP3 protein. Their findings have advanced our understanding of the visual cycle and its link to retinal diseases. A Natural Optical Detector The human eye, our natural optical sensor, is a remarkably complex organ that enables us to perceive the world. Its function depends on the coordinated activity of numerous molecules. Vision begins in the retina, a thin layer of tissue lining the back of the eye, where light-sensitive cells known as photoreceptors (rods and cones) are located. These photoreceptors detect light and convert it into electrical signals which are then transmitted to the brain via the optic nerve, allowing us to form visual images. A key molecule in this process is 11-cis-retinal (11cRAL), a light-sensitive compound that binds to opsin proteins such as rhodopsin. This interaction triggers the conversion of light into an electrical signal, initiating the visual process. When photons are absorbed, a cascade of chemical reactions, including the isomerization of 11-cis-retinal (11cRAL) to all-trans-retinal, initiates vision. To enable continued vision, the 11cRAL must be continuously regenerated through a process called the visual cycle. Here the story begins… Enter RBP3: The Retinoid Transporter This is where another molecule enters the picture. That is Retinol-binding protein 3 (RBP3), a special protein located in the intercellular matrix that maintains the proper functioning of the visual cycle. RBP3 works as a transporter of retinoids between photoreceptors and retinal pigment epithelium cells and is also known to bind some important fatty acids. It shuttles crucial molecules back and forth from the photoreceptors making the visual pigments ready for the multiple reactions under the photons triggering. The severity of diabetic retinopathy, an eye disease associated with diabetes, is associated with decreased levels of RBP3, and leads to progressive vision loss. As RBP3 interacts with receptors like the glucose transporter 1 (GLUT1) and vascular endothelial growth factor (VEGF), been involved in blood vessel growth and cellular signaling in the eye. Disrupted RBP3 causes accumulation of retinal “waste products”, such as lipofuscin, which may cause oxidative damage to the RPE and photoreceptor cells. Besides diabetic retinopathy, RBP3 level disruption can also lead to retinitis pigmentosa, pan-retinal degeneration, and myopia. Uncovering RBP3’s Structure Although the RBP3 connection with these diseases is well known, the mechanisms of the binding to retinoids to transport them are still not satisfactorily described. This mystery intrigued the international team of researchers led by Dr. Humberto Fernandes from the Institute of Physical Chemistry, Polish Academy of Sciences – International Centre for Translational Eye Research (ICTER) to solve that mystery. They focused on the insight into the detailed structure of the RBP3 when it binds different retinoids and fatty acids. The main aim of their investigations was to overcome the lack of an experimental structural model for the native form of RBP3. To achieve this, the authors purified the porcine RBP3 (pRBP3) and analyzed its structure using cryo-electron microscopy (cryoEM), where data was collected under cryogenic conditions, and after that data was refined by multiple steps and software to get the final 3D structure/model of the protein. Additionally, small-angle X-ray scattering (SAXS) was used to provide data on the conformation changes depending on the cargo molecules. Interestingly, the structure of the RBP3 can be elongated, or bent, suggesting the dynamic changes in the structure while docking its cargo. “Based on previous knowledge of RBP3 properties and straightforward methods for isolation of the porcine variant of RBP3, we purified porcine RBP3, and obtained a protein with Förster resonance energy transfer behaviour analogous to other RBP3s. Through analysis of cryoEM data, we determined a structure at 3.67 Å resolution of the porcine RBP3 protein and observed conformational changes upon ligand binding,” says Dr. Humberto Fernandes Insights into RBP3 Function Experimental results enabled the determination of the 3D structure and revealed conformational changes upon binding to its ligand as a step forward in the insight into the RBP3 functional mechanisms during the visual cycle. RBP3 as a large molecule consisting of four retinoid-binding modules, has long lost its original catalytic functionality, and it evolved to be a cargo transporter interacting with a variety of molecules and delivering retinoids and fatty acids in the eye. Research findings show the protein changes employing its shape during the binding of different molecules, which relates to the effectiveness of the interaction with the other molecules in the cargo and signaling. As a result, the conformational changes may play a significant role in the regulation of the light conversion into the visual signals. Dr. Fernandes remarks, “In all measured parameters, the porcine variant mimics the more completely characterized bovine variant. The capacity of RBP3 to load different retinoids and fatty acids, the ability of the latter to displace the former, and the conformational changes dependent on ligand identity might be the basis for the loading and unloading of retinoids (and potentially DHA) to the intended cell types bordering the IPM intercellular matrix. Thus, RBP3 complexes merit further investigation.” Understanding the proteins, including genetic mutations that affect the protein’s behaviour, like RBP3, is crucial to describe the mechanisms of the processes that appear in retinal diseases. Revealing the detailed structure of this bioactive molecule is a milestone in the studies on the interactions with different proteins. The presented findings bring the bright light into potentially more effective and faster diagnostics, where the RBP3 molecule would work as an early-stage retinal disease development biomarker. What is more, it can help in the regulation of the RBP3 activity to develop treatments for the disruption of the visual process. Reference: “CryoEM structure and small-angle X-ray scattering analyses of porcine retinol-binding protein 3” by Vineeta Kaushik, Luca Gessa, Nelam Kumar, Matyáš Pinkas, Mariusz Czarnocki-Cieciura, Krzysztof Palczewski, Jiří Nováček and Humberto Fernandes, 1 January 2025, Open Biology. DOI: 10.1098/rsob.240180 The work was supported Foundation for Polish Science co-financed by the European Union under European Funds for Smart Economy (FENG.02.01-IP.05-T005/23), and (MAB/2019/12) project within the International Research Agendas programme of the Foundation for Polish Science co-financed by the European Union under the European Regional Development Fund. It was also supported by the National Institutes of Health R01EY009339. The authors also acknowledge support to the Department of Ophthalmology Gavin Herbert Eye Institute at the University of California, Irvine from an unrestricted Research to Prevent Blindness award, from NIH core grant P30EY034070, support by MEYS CR (LM2023042) and European Regional Development Fund-Project “Innovation of Czech Infrastructure for Integrative Structural Biology” (No. CZ.02.01.01/00/23_015/0008175) and iNEXT-Discovery, project number 871037, funded by the Horizon 2020 program of the European Commission, the PASIFIC postdoctoral fellowship programme (Agreement No PAN.BFB.S.BDN.315.022.2022; Project No. DPE/2023/00007), this project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 847639 and from the Ministry of Science and Higher Education, and cryoEM training through the Wellcome/MRC-funded cryoEM training program (218785/Z/19/Z). In a recent study, researchers demonstrated that melatonin and two of its byproducts aid in memory retention in the brain. They also have the potential to protect mice, and potentially humans, from cognitive decline. Researchers at Tokyo Medical and Dental University (TMDU) in Japan show that melatonin and its metabolites promote the formation of long-term memories in mice and protect against cognitive decline. Researchers at Tokyo Medical and Dental University (TMDU) showed that melatonin’s metabolite AMK can enhance the formation of long-term memories in mice. Memory of objects were tested after treatment with melatonin or two of its metabolites. Older mice that normally performed poorly on the memory task showed improvements as dosage increased. The metabolite AMK was found to be the most important as melatonin failed to improve memory if it was blocked from metabolizing into AMK. Walk down the supplement aisle in your local drugstore and you’ll find fish oil, ginkgo, vitamin E, and ginseng, all touted as memory boosters that can help you avoid cognitive decline. You’ll also find melatonin, which is sold primarily in the United States as a sleep supplement. It now looks like melatonin marketers might have to do a rethink. In a new study, researchers led by Atsuhiko Hattori at Tokyo Medical and Dental University (TMDU) in Japan have shown that melatonin and two of its metabolites help memories stick around in the brain and can shield mice, and potentially people, from cognitive decline. One of the easiest ways to test memory in mice is to rely on their natural tendency to examine unfamiliar objects. Given a choice, they’ll spend more time checking out unfamiliar objects than familiar ones. The trick is that for something to be familiar, it has to be remembered. Like in people, cognitive decline in mice manifests as poor memory, and when tested on this novel object recognition task, they behave as if both objects are new. Three 1-minute training trials (A) revealed age-associated object memory decline in middle-aged and old mice at 1 day post-training (B). Systemic AMK (1 mg/kg) administered after a single 1-minute training trial enhanced object memory at 1 and 4 days post-training in all age groups (D-F). Data are presented as mean ± standard error. *P < .05 and **P < .01 indicate significantly different than chance performance (50%). Discrimination index (%) = time exploring novel object/ total object exploration time during test X 100. Credit: Department of Biology, TMDU Melatonin Metabolites The group of researchers at TMDU were curious about melatonin’s metabolites, the molecules that melatonin is broken down into after entering the body. “We know that melatonin is converted into N1-acetyl-N2-formyl-5-methoxykynuramine (AFMK) and N1-acetyl-5-methoxykynuramine (AMK) in the brain,” explains Hattori, “and we suspected that they might promote cognition.” To test their hypothesis, the researchers familiarized mice to objects and gave them doses of melatonin and the two metabolites 1 hour later. Then, they tested their memory the next day. They found that memory improved after treatment, and that AMK was the most effective. All three accumulated in the hippocampal region of the brain, a region important for turning experiences into memories. For young mice, exposure to an object three times in a day is enough for it to be remembered the next day on the novel object recognition task. In contrast, older mice behave as if both objects are new and unfamiliar, a sign of cognitive decline. However, one dose of AMK 15 min after a single exposure to an object, and older mice were able to remember the objects up to 4 days later. Potential for Alzheimer’s Prevention Lastly, the researchers found that long-term memory formation could not be enhanced after blocking melatonin from being converted into AMK in the brain. “We have shown that melatonin’s metabolite AMK can facilitate memory formation in all ages of mice,” says Hattori. “Its effect on older mice is particularly encouraging and we are hopeful that future studies will show similar effects in older people. If this happens, AMK therapy could eventually be used to reduce the severity of Mild Cognitive Impairment and its potential conversion to Alzheimer’s disease.” Reference: “The melatonin metabolite N1‐acetyl‐5‐methoxykynuramine facilitates long‐term object memory in young and aging mice” by Hikaru Iwashita, Yukihisa Matsumoto, Yusuke Maruyama, Kazuki Watanabe, Atsuhiko Chiba and Atsuhiko Hattori, 30 October 2020, Journal of Pineal Research. DOI: 10.1111/jpi.12703 The Rhizobial nitrogen fixing symbionts (fluorescently-labeled in orange and green using genetic probes) residing inside diatoms collected from the tropical North Atlantic. The nucleus of the diatom is shown in bright blue. Credit: Mertcan Esti/Max Planck Institute for Marine Microbiology, Bremen, Germany New research reveals a symbiosis between a marine diatom and a Rhizobia-like bacterium, essential for nitrogen fixation in the ocean, which may also impact future agricultural practices by enabling engineered nitrogen-fixing plants. Scientists have discovered that Rhizobia bacteria, traditionally known for symbiotic nitrogen fixation in legumes, also partner with marine diatoms to fix nitrogen, offering a solution to a long-standing marine mystery. This finding not only enhances understanding of oceanic nitrogen cycles but also suggests potential agricultural and evolutionary applications, highlighting the bacteria’s critical role in marine productivity and carbon dioxide uptake. Nitrogen is an essential component of all living organisms. It also plays a crucial role in regulating the growth of crops on land as well as microscopic marine plants, which produce half of the world’s oxygen. Although atmospheric nitrogen gas is the largest pool of nitrogen, plants cannot transform it into a usable form. However, certain crops such as soybeans, peas, and alfalfa, collectively known as legumes, have acquired Rhizobial bacterial partners that “fix” atmospheric nitrogen into ammonium, which plants can use. This partnership makes legumes one of the most important sources of proteins in our food supply. A Groundbreaking Discovery in Marine Biology It has remained unclear how marine plants obtain the nitrogen they need to grow. Now, researchers from the Max Planck Institute for Marine Microbiology, the Alfred Wegener Institute, and the University of Vienna have discovered that Rhizobia can form similar partnerships with tiny marine plants called diatoms. This finding, detailed in a recent Nature publication, not only solves a longstanding marine mystery but also offers insights that could lead to revolutionary agricultural technologies. Unveiling a New Marine Nitrogen Fixer Previously, it was assumed that most nitrogen fixation in the oceans was carried out by photosynthetic organisms called cyanobacteria. However, in vast regions of the ocean, there are not enough cyanobacteria to account for measured nitrogen fixation. Thus, many scientists hypothesized that non-cyanobacterial microorganisms must be responsible for the “missing” nitrogen fixation. “For years, we have been finding gene fragments encoding the nitrogen-fixing nitrogenase enzyme, which appeared to belong to one particular non-cyanobacterial nitrogen fixer,” says Marcel Kuypers, lead author of the study. “But, we couldn’t work out precisely who the enigmatic organism was and therefore had no idea whether it was important for nitrogen fixation.” Meet-and-greet at sea. The two research vessels involved in the study (R/V Meteor and R/V Maria S. Merian) met a couple of times during the expedition. Credit: Max Planck Institute for Marine Microbiology Bremen/Wiebke Mohr Revealing the Identity of a Mysterious Symbiont In 2020, the scientists traveled from Bremen to the tropical North Atlantic to join an expedition involving two German research vessels. They collected hundreds of liters of seawater from the region, in which a large part of global marine nitrogen fixation takes place, hoping to both identify and quantify the importance of the mysterious nitrogen fixer. It took them the next three years to finally puzzle together its genome. “It was a long and painstaking piece of detective work but ultimately, the genome solved many mysteries,” says Bernhard Tschitschko, first author of the study and bioinformatician now working at the University of Innsbruck. Co-author and bioinformatician Daan Speth from the University of Vienna adds: “Based on the nitrogenase gene fragment we had seen in many marine samples before, one would have expected to find this gene in a Vibrio-related organism, but by carefully piecing together the genetic information it turned out that instead, it belonged to a genome closely related to known Rhizobia, which typically live in symbiosis with legume plants.” Together with its surprisingly small genome, this raised the possibility that the marine Rhizobia might be a symbiont. A group of diatoms with their fluorescently-labeled symbionts. Credit: Max Planck Institute for Marine Microbiology Bremen/Mertcan Esti Uncovering a Unique Symbiotic Relationship Spurred on by these discoveries, the authors developed a genetic probe that could be used to fluorescently label the Rhizobia. “This allowed us to visualize the Rhizobia directly in their native habitat – the complex environmental samples collected in the Atlantic,” says Katharina Kitzinger, who started contributing to this project at the Max Planck Institute and continued lending her expertise after moving to the University of Vienna. Their suspicions about it being a symbiont were quickly confirmed. “We were finding sets of four Rhizobia, always sitting in the same spot inside the diatoms,” says Kuypers. “It was very exciting as this is the first known symbiosis between a diatom and a non-cyanobacterial nitrogen fixer.” The scientists named the newly discovered symbiont Candidatus Tectiglobus diatomicola. Having finally worked out the identity of the missing nitrogen fixer, they focused their attention on working out how the bacteria and diatom live in partnership. Using a technology called nanoSIMS, they could show that the Rhizobia exchanges fixed nitrogen with the diatom in return for carbon. And it puts a lot of effort into it: “In order to support the diatom’s growth, the bacterium fixes 100-fold more nitrogen than it needs for itself,” Wiebke Mohr, one of the scientists on the paper explains. Implications for Marine Productivity and Carbon Uptake Next, the team turned back to the oceans to discover how widespread the new symbiosis might be in the environment. It quickly turned out that the newly discovered partnership is found throughout the world’s oceans, especially in regions where cyanobacterial nitrogen fixers are rare. Thus, these tiny organisms are likely major players in total oceanic nitrogen fixation and therefore play a crucial role in sustaining marine productivity and the global oceanic uptake of carbon dioxide. Potential Agricultural Applications of Marine Symbiosis Aside from its importance to nitrogen fixation in the oceans, the discovery of this symbiosis hints at other exciting opportunities in the future. Kuypers is particularly excited about what the discovery means from an evolutionary perspective. “The evolutionary adaptations of Ca. T. diatomicola are very similar to the endosymbiotic cyanobacterium UCYN-A, which functions as an early-stage nitrogen-fixing organelle. Therefore, it’s really tempting to speculate that Ca. T. diatomicola and its diatom host might also be in the early stages of becoming a single organism.” Tschitschko agrees that the identity and organelle-like nature of the symbiont is particularly intriguing. He says, “So far, such organelles have only been shown to originate from the cyanobacteria, but the implications of finding them amongst the Rhizobiales are very exciting, considering that these bacteria are incredibly important for agriculture. The small size and organelle-like nature of the marine Rhizobiales means that it might be a key candidate to engineer nitrogen-fixing plants someday.” The scientists will now continue to study the newly discovered symbiosis and see if more like it also exists in the oceans. Reference: “Rhizobia–diatom symbiosis fixes missing nitrogen in the ocean” by Bernhard Tschitschko, Mertcan Esti, Miriam Philippi, Abiel T. Kidane, Sten Littmann, Katharina Kitzinger, Daan R. Speth, Shengjie Li, Alexandra Kraberg, Daniela Tienken, Hannah K. Marchant, Boran Kartal, Jana Milucka, Wiebke Mohr and Marcel M. M. Kuypers, 9 May 2024, Nature. DOI: 10.1038/s41586-024-07495-w RRG455KLJIEVEWWF |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 最新創作 |
|
||||
|
||||
|
||||
|
||||
|
||||
