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Nature Plants

Qing-Long Wang, Ai-Zhen Sun, Si-Ting Chen, Li-Sha Chen, Fang-Qing Guo
Inositol-requiring enzyme 1 (IRE1) is the most conserved transducer of the unfolded protein response that produces either adaptive or death signals depending on the amplitude and duration of its activation. Here, we report that SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE 6 (SPL6)-deficient plants displayed hyperactivation of the endoplasmic reticulum (ER) stress sensor IRE1, leading to cell death in rice panicles, indicating that SPL6 is an essential survival factor for the suppression of persistent or intense ER stress conditions...
April 9, 2018: Nature Plants
Hisako Kubota-Kawai, Risa Mutoh, Kanako Shinmura, Pierre Sétif, Marc M Nowaczyk, Matthias Rögner, Takahisa Ikegami, Hideaki Tanaka, Genji Kurisu
Photosystem I (PSI), a large protein complex located in the thylakoid membrane, mediates the final step in light-driven electron transfer to the stromal electron carrier protein ferredoxin (Fd). Here, we report the first structural description of the PSI-Fd complex from Thermosynechococcus elongatus. The trimeric PSI complex binds three Fds in a non-equivalent manner. While each is recognized by a PSI protomer in a similar orientation, the distances between Fds and the PSI redox centres differ. Fd binding thus entails loss of the exact three-fold symmetry of the PSI's soluble subunits, inducing structural perturbations which are transferred to the lumen through PsaF...
April 2, 2018: Nature Plants
Annemarie Perez Boerema, Shintaro Aibara, Bijoya Paul, Victor Tobiasson, Dari Kimanius, Björn O Forsberg, Karin Wallden, Erik Lindahl, A Amunts
Oxygenic photosynthesis produces oxygen and builds a variety of organic compounds, changing the chemistry of the air, the sea and fuelling the food chain on our planet. The photochemical reactions underpinning this process in plants take place in the chloroplast. Chloroplasts evolved ~1.2 billion years ago from an engulfed primordial diazotrophic cyanobacterium, and chlororibosomes are responsible for synthesis of the core proteins driving photochemical reactions. Chlororibosomal activity is spatiotemporally coupled to the synthesis and incorporation of functionally essential co-factors, implying the presence of chloroplast-specific regulatory mechanisms and structural adaptation of the chlororibosome1,2 ...
April 2, 2018: Nature Plants
Shazia Farooq, Jevgenij Chmeliov, Emilie Wientjes, Rob Koehorst, Arjen Bader, Leonas Valkunas, Gediminas Trinkunas, Herbert van Amerongen
Photosystem II of higher plants is protected against light damage by thermal dissipation of excess excitation energy, a process that can be monitored through non-photochemical quenching of chlorophyll fluorescence. When the light intensity is lowered, non-photochemical quenching largely disappears on a time scale ranging from tens of seconds to many minutes. With the use of picosecond fluorescence spectroscopy, we demonstrate that one of the underlying mechanisms is only functional when the reaction centre of photosystem II is closed, that is when electron transfer is blocked and the risk of photodamage is high...
April 2, 2018: Nature Plants
Narel Y Paniagua Zambrana, Rainer W Bussmann, Robbie E Hart, Araceli L Moya Huanca, Gere Ortiz Soria, Milton Ortiz Vaca, David Ortiz Álvarez, Jorge Soria Morán, María Soria Morán, Saúl Chávez, Bertha Chávez Moreno, Gualberto Chávez Moreno, Oscar Roca, Erlin Siripi
Although freelisting and semi-structured interviews are widespread methods in ethnobotany, few studies quantitatively examine how these methods may bias results. Using a comprehensive ethnobotanical inventory of palm species, uses and names in the Chácobo tribe of Bolivia, we show that interviews elicit more items than freelists, but the effect is sensitive to sample size, item type and data categorization. This implies that even subtle methodological choices may greatly affect reported results.
April 2, 2018: Nature Plants
John F Allen
No abstract text is available yet for this article.
April 2, 2018: Nature Plants
Fang Xu, David Jackson
No abstract text is available yet for this article.
March 26, 2018: Nature Plants
Jun Lyu
No abstract text is available yet for this article.
March 26, 2018: Nature Plants
Candice N Hirsch, Nathan M Springer
No abstract text is available yet for this article.
March 19, 2018: Nature Plants
Beat Keller, Simon G Krattinger
No abstract text is available yet for this article.
March 19, 2018: Nature Plants
Sebastian Ziemann, Karina van der Linde, Urs Lahrmann, Beyda Acar, Farnusch Kaschani, Tom Colby, Markus Kaiser, Yezhang Ding, Eric Schmelz, Alisa Huffaker, Nicholas Holton, Cyril Zipfel, Gunther Doehlemann
Localized control of cell death is crucial for the resistance of plants to pathogens. Papain-like cysteine proteases (PLCPs) regulate plant defence to drive cell death and protection against biotrophic pathogens. In maize (Zea mays), PLCPs are crucial in the orchestration of salicylic acid (SA)-dependent defence signalling. Despite this central role in immunity, it remains unknown how PLCPs are activated, and which downstream signals they induce to trigger plant immunity. Here, we discover an immune signalling peptide, Z...
February 26, 2018: Nature Plants
Ryan Scarrow
No abstract text is available yet for this article.
February 26, 2018: Nature Plants
David J Beerling, Jonathan R Leake, Stephen P Long, Julie D Scholes, Jurriaan Ton, Paul N Nelson, Michael Bird, Euripides Kantzas, Lyla L Taylor, Binoy Sarkar, Mike Kelland, Evan DeLucia, Ilsa Kantola, Christoph Müller, Greg Rau, James Hansen
The magnitude of future climate change could be moderated by immediately reducing the amount of CO2 entering the atmosphere as a result of energy generation and by adopting strategies that actively remove CO2 from it. Biogeochemical improvement of soils by adding crushed, fast-reacting silicate rocks to croplands is one such CO2 -removal strategy. This approach has the potential to improve crop production, increase protection from pests and diseases, and restore soil fertility and structure. Managed croplands worldwide are already equipped for frequent rock dust additions to soils, making rapid adoption at scale feasible, and the potential benefits could generate financial incentives for widespread adoption in the agricultural sector...
February 19, 2018: Nature Plants
Chris Surridge
No abstract text is available yet for this article.
January 31, 2018: Nature Plants
Anna Maria Mercuri, Rita Fornaciari, Marina Gallinaro, Stefano Vanin, Savino di Lernia
The human selection of food plants cannot always have been aimed exclusively at isolating the traits typical of domesticated species today. Each phase of global change must have obliged plants and humans to cope with and develop innovative adaptive strategies. Hundreds of thousands of wild cereal seeds from the Holocene 'green Sahara' tell a story of cultural trajectories and environmental instability revealing that a complex suite of weediness traits were preferred by both hunter-gatherers and pastoralists...
January 29, 2018: Nature Plants
Tao Wan, Zhi-Ming Liu, Ling-Fei Li, Andrew R Leitch, Ilia J Leitch, Rolf Lohaus, Zhong-Jian Liu, Hai-Ping Xin, Yan-Bing Gong, Yang Liu, Wen-Cai Wang, Ling-Yun Chen, Yong Yang, Laura J Kelly, Ji Yang, Jin-Ling Huang, Zhen Li, Ping Liu, Li Zhang, Hong-Mei Liu, Hui Wang, Shu-Han Deng, Meng Liu, Ji Li, Lu Ma, Yan Liu, Yang Lei, Wei Xu, Ling-Qing Wu, Fan Liu, Qian Ma, Xin-Ran Yu, Zhi Jiang, Guo-Qiang Zhang, Shao-Hua Li, Rui-Qiang Li, Shou-Zhou Zhang, Qing-Feng Wang, Yves Van de Peer, Jin-Bo Zhang, Xiao-Ming Wang
Gnetophytes are an enigmatic gymnosperm lineage comprising three genera, Gnetum, Welwitschia and Ephedra, which are morphologically distinct from all other seed plants. Their distinctiveness has triggered much debate as to their origin, evolution and phylogenetic placement among seed plants. To increase our understanding of the evolution of gnetophytes, and their relation to other seed plants, we report here a high-quality draft genome sequence for Gnetum montanum, the first for any gnetophyte. By using a novel genome assembly strategy to deal with high levels of heterozygosity, we assembled >4 Gb of sequence encoding 27,491 protein-coding genes...
January 29, 2018: Nature Plants
Michael S Barker
No abstract text is available yet for this article.
January 29, 2018: Nature Plants
Ralf Reski
No abstract text is available yet for this article.
January 29, 2018: Nature Plants
Maojun Wang, Pengcheng Wang, Min Lin, Zhengxiu Ye, Guoliang Li, Lili Tu, Chao Shen, Jianying Li, Qingyong Yang, Xianlong Zhang
The formation of polyploids significantly increases the complexity of transcriptional regulation, which is expected to be reflected in sophisticated higher-order chromatin structures. However, knowledge of three-dimensional (3D) genome structure and its dynamics during polyploidization remains poor. Here, we characterize 3D genome architectures for diploid and tetraploid cotton, and find the existence of A/B compartments and topologically associated domains (TADs). By comparing each subgenome in tetraploids with its extant diploid progenitor, we find that genome allopolyploidization has contributed to the switching of A/B compartments and the reorganization of TADs in both subgenomes...
January 29, 2018: Nature Plants
Guillaume Tena
No abstract text is available yet for this article.
April 2018: Nature Plants
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