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Nature Plants

Florian A Busch, Rowan F Sage, Graham D Farquhar
Photorespiration is a major bioengineering target for increasing crop yields as it is often considered a wasteful process. Photorespiratory metabolism is integrated into leaf metabolism and thus may have certain benefits. Here, we show that plants can increase their rate of photosynthetic CO2 uptake when assimilating nitrogen de novo via the photorespiratory pathway by fixing carbon as amino acids in addition to carbohydrates. Plants fed NO3- had higher rates of CO2 assimilation under photorespiratory than low-photorespiratory conditions, while plants lacking NO3- nutrition exhibited lower stimulation of CO2 uptake...
December 11, 2017: Nature Plants
Guillaume Tena
No abstract text is available yet for this article.
November 27, 2017: Nature Plants
Min Ouyang, Xiaoyi Li, Shun Zhao, Hua Pu, Jianren Shen, Zach Adam, Tim Clausen, Lixin Zhang
The high temperature requirement A (HtrA) proteases (also termed Deg proteases) play important roles in diverse organisms by regulating protein quality and quantity. One of the 16 Arabidopsis homologs, Deg9, is located in the nucleus where it modulates cytokinin- and light-mediated signalling via degrading the ARABIDOPSIS RESPONSE REGULATOR 4 (ARR4). To uncover the structural features underlying the proteolytic activity of Deg9, we determined its crystal structure. Unlike the well-established trimeric building block of HtrAs, Deg9 displays a novel octameric structure consisting of two tetrameric rings that have distinct conformations...
November 27, 2017: Nature Plants
Xiang Zhao, Zhigang Meng, Yan Wang, Wenjie Chen, Changjiao Sun, Bo Cui, Jinhui Cui, Manli Yu, Zhanghua Zeng, Sandui Guo, Dan Luo, Jerry Q Cheng, Rui Zhang, Haixin Cui
Genetic modification plays a vital role in breeding new crops with excellent traits. Almost all the current genetic modification methods require regeneration from tissue culture, involving complicated, long and laborious processes. In particular, many crop species such as cotton are difficult to regenerate. Here, we report a novel transformation platform technology, pollen magnetofection, to directly produce transgenic seeds without regeneration. In this system, exogenous DNA loaded with magnetic nanoparticles was delivered into pollen in the presence of a magnetic field...
November 27, 2017: Nature Plants
Sarah E O'Connor
No abstract text is available yet for this article.
November 27, 2017: Nature Plants
Stephanie Ruf, Ralph Bock
No abstract text is available yet for this article.
November 27, 2017: Nature Plants
André Magnan
No abstract text is available yet for this article.
November 27, 2017: Nature Plants
Guangyao Zhao, Cheng Zou, Kui Li, Kai Wang, Tianbao Li, Lifeng Gao, Xiaoxia Zhang, Hongjin Wang, Zujun Yang, Xu Liu, Wenkai Jiang, Long Mao, Xiuying Kong, Yuannian Jiao, Jizeng Jia
Wheat is an important global crop with an extremely large and complex genome that contains more transposable elements (TEs) than any other known crop species. Here, we generated a chromosome-scale, high-quality reference genome of Aegilops tauschii, the donor of the wheat D genome, in which 92.5% sequences have been anchored to chromosomes. Using this assembly, we accurately characterized genic loci, gene expression, pseudogenes, methylation, recombination ratios, microRNAs and especially TEs on chromosomes...
November 20, 2017: Nature Plants
Zhenxiang Li, Dandan Zhang, Xiangyu Xiong, Bingyu Yan, Wei Xie, Jen Sheen, Jian-Feng Li
Overexpression of complementary DNA represents the most commonly used gain-of-function approach for interrogating gene functions and for manipulating biological traits. However, this approach is challenging and inefficient for multigene expression due to increased labour for cloning, limited vector capacity, requirement of multiple promoters and terminators, and variable transgene expression levels. Synthetic transcriptional activators provide a promising alternative strategy for gene activation by tethering an autonomous transcription activation domain (TAD) to an intended gene promoter at the endogenous genomic locus through a programmable DNA-binding module...
November 20, 2017: Nature Plants
Ryan Scarrow
No abstract text is available yet for this article.
November 20, 2017: Nature Plants
James Giovannoni
No abstract text is available yet for this article.
November 13, 2017: Nature Plants
Lyudmila V Sidorenko, Tzuu-Fen Lee, Aaron Woosley, William A Moskal, Scott A Bevan, P Ann Owens Merlo, Terence A Walsh, Xiujuan Wang, Staci Weaver, Todd P Glancy, PoHao Wang, Xiaozeng Yang, Shreedharan Sriram, Blake C Meyers
The molecular basis of transgene susceptibility to silencing is poorly characterized in plants; thus, we evaluated several transgene design parameters as means to reduce heritable transgene silencing. Analyses of Arabidopsis plants with transgenes encoding a microalgal polyunsaturated fatty acid (PUFA) synthase revealed that small RNA (sRNA)-mediated silencing, combined with the use of repetitive regulatory elements, led to aggressive transposon-like silencing of canola-biased PUFA synthase transgenes. Diversifying regulatory sequences and using native microalgal coding sequences (CDSs) with higher GC content improved transgene expression and resulted in a remarkable trans-generational stability via reduced accumulation of sRNAs and DNA methylation...
October 30, 2017: Nature Plants
Yasuhiro Ito, Ayako Nishizawa-Yokoi, Masaki Endo, Masafumi Mikami, Yoko Shima, Nobutaka Nakamura, Eiichi Kotake-Nara, Susumu Kawasaki, Seiichi Toki
Tomato (Solanum lycopersicum) rin mutants completely fail to ripen: they do not produce red pigmentation, soften or induce an ethylene burst. Therefore, RIN has long been believed to function as a major regulator that is essential for the induction of ripening. Here, we provide evidence contradicting this concept of RIN function, showing induction of fruit ripening in the absence of RIN. A CRISPR/Cas9-mediated RIN-knockout mutation did not repress initiation of ripening and the mutant fruits showed moderate red colouring...
October 30, 2017: Nature Plants
Xufeng Bai, Yong Huang, Yong Hu, Haiyang Liu, Bo Zhang, Cezary Smaczniak, Gang Hu, Zhongmin Han, Yongzhong Xing
Transcriptional silencer and copy number variants (CNVs) are associated with gene expression. However, their roles in generating phenotypes have not been well studied. Here we identified a rice quantitative trait locus, SGDP7 (Small Grain and Dense Panicle 7). SGDP7 is identical to FZP (FRIZZY PANICLE), which represses the formation of axillary meristems. The causal mutation of SGDP7 is an 18-bp fragment, named CNV-18bp, which was inserted ~5.3 kb upstream of FZP and resulted in a tandem duplication in the cultivar Chuan 7...
October 30, 2017: Nature Plants
Xiuren Zhang
No abstract text is available yet for this article.
October 30, 2017: Nature Plants
Hailiang Mao, Bibek Aryal, Tobias Langenecker, Jörg Hagmann, Markus Geisler, Markus Grebe
The outermost cell layer of plant roots (epidermis) constantly encounters environmental challenges. The epidermal outer plasma membrane domain harbours the PENETRATION3 (PEN3)/ABCG36/PDR8 ATP-binding cassette transporter that confers non-host resistance to several pathogens. Here, we show that the Arabidopsis ENDOPLASMIC RETICULUM-ARRESTED PEN3 (EAP3) BTB/POZ-domain protein specifically mediates PEN3 exit from the endoplasmic reticulum and confers resistance to a root-penetrating fungus, providing prime evidence for BTB/POZ-domain protein-dependent membrane trafficking underlying disease resistance...
October 30, 2017: Nature Plants
Ryan Scarrow
No abstract text is available yet for this article.
October 30, 2017: Nature Plants
Thomas Potuschak, Pascal Genschik
No abstract text is available yet for this article.
October 30, 2017: Nature Plants
Lei Wang, Markus Albert, Elias Einig, Ursula Fu Rst, Damaris Krust, Georg Felix
In the version of this Article originally published, Fig. 6b, which is composed of individual pictures of six plants, inadvertently and erroneously displayed the same image of one Col-0 wt plant twice. This has been corrected so that Fig. 6b now shows two different representative plants for the Col-0 wt control.
October 23, 2017: Nature Plants
Martin Dickman, Brett Williams, Yurong Li, Paul de Figueiredo, Thomas Wolpert
In the version of this Perspective originally published, the name of co-author Paul de Figueiredo was incorrect. This has now been corrected.
October 16, 2017: Nature Plants
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