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Nature Plants

Céline Forzani, Christian Meyer
No abstract text is available yet for this article.
March 4, 2019: Nature Plants
Johan Zicola, Liangyu Liu, Petra Tänzler, Franziska Turck
FLOWERING LOCUS T (FT) plays a major role in regulating the floral transition in response to an inductive long day photoperiod in Arabidopsis thaliana. Expression of FT in leaves is dependent on the distal transcriptional enhancer Block C, located 5-kilobases (kb) upstream of the transcriptional start site (TSS). We expressed an inverted repeat of Block C to induce local DNA methylation and heterochromatin formation, which lead to FT downregulation in an inductive photoperiod. Using targeted DNA methylation as a tool to uncover further regulatory regions at the FT locus, we identified Block E, located 1 kb downstream of the gene, as a novel enhancer of FT...
March 4, 2019: Nature Plants
Shuai Zhang, Ming Feng, Wen Chen, Xiaofeng Zhou, Jingyun Lu, Yaru Wang, Yonghong Li, Cai-Zhong Jiang, Su-Sheng Gan, Nan Ma, Junping Gao
Plants have evolved sophisticated systems in response to environmental changes, and growth arrest is a common strategy used to enhance stress tolerance. Despite the growth-survival trade-off being essential to the shaping of plant productivity, the mechanisms balancing growth and survival remain largely unknown. Aquaporins play a crucial role in growth and stress responses by controlling water transport across membranes. Here, we show that RhPIP2;1, an aquaporin from rose (Rosa sp.), interacts with a membrane-tethered MYB protein, RhPTM...
March 4, 2019: Nature Plants
Hijiri Fujioka, Hiroaki Samejima, Hideyuki Suzuki, Masaharu Mizutani, Masanori Okamoto, Yukihiro Sugimoto
Striga parasitizes major crops in arid regions, depriving the host crop of nutrients through the transpiration stream and causing vast agricultural damage. Here, we report on the mechanism underlying how Striga maintains high transpiration under drought conditions. We found that Striga did not respond to abscisic acid, the phytohormone responsible for controlling stomatal closure. Protein phosphatase 2C of Striga (ShPP2C1) is not regulated by abscisic acid receptors, and this feature is attributable to specific mutations in its amino acid sequence...
February 25, 2019: Nature Plants
Stephanie Ruf, Joachim Forner, Claudia Hasse, Xenia Kroop, Stefanie Seeger, Laura Schollbach, Anne Schadach, Ralph Bock
The development of technologies for the stable genetic transformation of plastid (chloroplast) genomes has been a boon to both basic and applied research. However, extension of the transplastomic technology to major crops and model plants has proven extremely challenging, and the species range of plastid transformation is still very much limited in that most species currently remain recalcitrant to plastid genome engineering. Here, we report an efficient plastid transformation technology for the model plant Arabidopsis thaliana that relies on root-derived microcalli as a source tissue for biolistic transformation...
February 18, 2019: Nature Plants
Takafumi Kato, Kaoru Kumazaki, Miki Wada, Reiya Taniguchi, Takanori Nakane, Keitaro Yamashita, Kunio Hirata, Ryuichiro Ishitani, Koichi Ito, Tomohiro Nishizawa, Osamu Nureki
The iron ion is an essential cofactor in several vital enzymatic reactions, such as DNA replication, oxygen transport, and respiratory and photosynthetic electron transfer chains, but its excess accumulation induces oxidative stress in cells. Vacuolar iron transporter 1 (VIT1) is important for iron homeostasis in plants, by transporting cytoplasmic ferrous ions into vacuoles. Modification of the VIT1 gene leads to increased iron content in crops, which could be used for the treatment of human iron deficiency diseases...
February 11, 2019: Nature Plants
Atsushi J Nagano, Tetsuhiro Kawagoe, Jiro Sugisaka, Mie N Honjo, Koji Iwayama, Hiroshi Kudoh
In Fig. 3b of the version of this Article originally published, a number of arrows indicating repression of downstream processes were mistakenly formatted as arrows indicating activation of downstream processes. This has now been amended in all versions of the Article.
February 8, 2019: Nature Plants
Nick Pullen, Naichao Zhang, Albor Dobon Alonso, Steven Penfield
Plants modulate their growth rate according to seasonal and environmental cues using a suite of growth repressors known to interact directly with cellular machinery controlling cell division and growth. Mutants lacking growth repressors show increased growth rates1,2 , but the mechanism by which these plants ensure source availability for faster growth is unclear. Here, we undertake a comprehensive analysis of the fast-growth phenotype of a quintuple growth-repressor mutant, using a combination of theoretical and experimental approaches to understand the physiological basis of source-sink coordination...
February 4, 2019: Nature Plants
Gerald A Tuskan
No abstract text is available yet for this article.
January 28, 2019: Nature Plants
Ulrike Zentgraf
No abstract text is available yet for this article.
January 24, 2019: Nature Plants
Jinhui Chen, Zhaodong Hao, Xuanmin Guang, Chenxi Zhao, Pengkai Wang, Liangjiao Xue, Qihui Zhu, Linfeng Yang, Yu Sheng, Yanwei Zhou, Haibin Xu, Hongqing Xie, Xiaofei Long, Jin Zhang, Zhangrong Wang, Mingming Shi, Ye Lu, Siqin Liu, Lanhua Guan, Qianhua Zhu, Liming Yang, Song Ge, Tielong Cheng, Thomas Laux, Qiang Gao, Ye Peng, Na Liu, Sihai Yang, Jisen Shi
In the Supplementary Information file originally published with this Letter, the authors mistakenly omitted Supplementary Table 14; this has now been amended.
January 23, 2019: Nature Plants
Min Jia, Xiayan Liu, Hui Xue, Yue Wu, Lin Shi, Rui Wang, Yu Chen, Ni Xu, Jun Zhao, Jingxia Shao, Yafei Qi, Lijun An, Jen Sheen, Fei Yu
Protein homeostasis is essential for cellular functions and longevity, and the loss of proteostasis is one of the hallmarks of senescence. Autophagy is an evolutionarily conserved cellular degradation pathway that is critical for the maintenance of proteostasis. Paradoxically, autophagy deficiency leads to accelerated protein loss by unknown mechanisms. We discover that the ABNORMAL SHOOT3 (ABS3) subfamily of multidrug and toxic compound extrusion transporters promote senescence under natural and carbon-deprivation conditions in Arabidopsis thaliana...
January 21, 2019: Nature Plants
Micael Jonsson, Jan Bengtsson, Lars Gamfeldt, Jon Moen, Tord Snäll
Global and local ecosystem change resulting in diversity loss has motivated efforts to understand relationships between species diversity and ecosystem services. However, it is unclear how such a general understanding can inform policies for the management of ecosystem services in production systems, because these systems are primarily used for food or fibre, and are rarely managed for the conservation of species diversity. Here, using data from a nationwide forest inventory covering an area of 230,000 km2 , we show that relative abundances of commercial tree species in mixed stands strongly influence the potential to provide ecosystem services...
January 21, 2019: Nature Plants
Wannes Hubau, Tom De Mil, Jan Van den Bulcke, Oliver L Phillips, Bhély Angoboy Ilondea, Joris Van Acker, Martin J P Sullivan, Laurent Nsenga, Benjamin Toirambe, Camille Couralet, Lindsay F Banin, Serge K Begne, Timothy R Baker, Nils Bourland, Eric Chezeaux, Connie J Clark, Murray Collins, James A Comiskey, Aida Cuni-Sanchez, Victor Deklerck, Sofie Dierickx, Jean-Louis Doucet, Corneille E N Ewango, Ted R Feldpausch, Martin Gilpin, Christelle Gonmadje, Jefferson S Hall, David J Harris, Olivier J Hardy, Marie-Noel D Kamdem, Emmanuel Kasongo Yakusu, Gabriela Lopez-Gonzalez, Jean-Remy Makana, Yadvinder Malhi, Faustin M Mbayu, Sam Moore, Jacques Mukinzi, Georgia Pickavance, John R Poulsen, Jan Reitsma, Mélissa Rousseau, Bonaventure Sonké, Terry Sunderland, Hermann Taedoumg, Joey Talbot, John Tshibamba Mukendi, Peter M Umunay, Jason Vleminckx, Lee J T White, Lise Zemagho, Simon L Lewis, Hans Beeckman
Quantifying carbon dynamics in forests is critical for understanding their role in long-term climate regulation1-4 . Yet little is known about tree longevity in tropical forests3,5-8 , a factor that is vital for estimating carbon persistence3,4 . Here we calculate mean carbon age (the period that carbon is fixed in trees7 ) in different strata of African tropical forests using (1) growth-ring records with a unique timestamp accurately demarcating 66 years of growth in one site and (2) measurements of diameter increments from the African Tropical Rainforest Observation Network (23 sites)...
January 21, 2019: Nature Plants
Atsushi J Nagano, Tetsuhiro Kawagoe, Jiro Sugisaka, Mie N Honjo, Koji Iwayama, Hiroshi Kudoh
As most organisms have evolved in seasonal environments, their environmental responses should be adapted to seasonal transitions. Here we show that the combination of temperature and day length shapes the seasonal dynamics of the transcriptome and adaptation to seasonal environments in a natural habitat of a perennial plant Arabidopsis halleri subsp. gemmifera. Weekly transcriptomes for two years and bihourly diurnal transcriptomes on the four equinoxes/solstices, identified 2,879 and 7,185 seasonally- and diurnally-oscillating genes, respectively...
January 7, 2019: Nature Plants
Kenneth Grogan, Dirk Pflugmacher, Patrick Hostert, Ole Mertz, Rasmus Fensholt
Tropical forests continue to undergo a rapid transformation. The expansion of rubber tree (Hevea brasiliensis) plantations has been reported as a major driver of forest loss, linked to a boom in market demand. Distant commodity markets have spurred a surge of large-scale economic land concessions granted throughout tropical Southeast Asia. Using satellite imagery, we show the impact of rubber tree plantations on Cambodian forest cover and analyse how annual forest-to-rubber conversion rates relate to global rubber prices from 2001 to 2015...
December 31, 2018: Nature Plants
Yusuke Aihara, Konomi Fujimura-Kamada, Tomohito Yamasaki, Jun Minagawa
Light is essential for photosynthesis, but the amounts of light that exceed an organism's assimilation capacity can cause serious damage1 . Photosynthetic organisms minimize such potential harm through protection mechanisms collectively referred to as non-photochemical quenching2 . One mechanism of non-photochemical quenching called energy-dependent quenching (qE quenching) is readily activated under high-light conditions and dissipates excess energy as heat. LIGHT-HARVESTING COMPLEX STRESS-RELATED PROTEINS 1 and 3 (LHCSR1 and LHCSR3) have been proposed to mediate qE quenching in the green alga Chlamydomonas reinhardtii when grown under high-light conditions3 ...
December 31, 2018: Nature Plants
Sariel Hübner, Natalia Bercovich, Marco Todesco, Jennifer R Mandel, Jens Odenheimer, Emanuel Ziegler, Joon S Lee, Gregory J Baute, Gregory L Owens, Christopher J Grassa, Daniel P Ebert, Katherine L Ostevik, Brook T Moyers, Sarah Yakimowski, Rishi R Masalia, Lexuan Gao, Irina Ćalić, John E Bowers, Nolan C Kane, Dirk Z H Swanevelder, Timo Kubach, Stephane Muños, Nicolas B Langlade, John M Burke, Loren H Rieseberg
Domesticated plants and animals often display dramatic responses to selection, but the origins of the genetic diversity underlying these responses remain poorly understood. Despite domestication and improvement bottlenecks, the cultivated sunflower remains highly variable genetically, possibly due to hybridization with wild relatives. To characterize genetic diversity in the sunflower and to quantify contributions from wild relatives, we sequenced 287 cultivated lines, 17 Native American landraces and 189 wild accessions representing 11 compatible wild species...
December 31, 2018: Nature Plants
Pingping Qian, Wen Song, Toshiya Yokoo, Ayako Minobe, Guodong Wang, Takashi Ishida, Shinichiro Sawa, Jijie Chai, Tatsuo Kakimoto
In the version of this Article originally published, the authors incorrectly stated that the work was supported by Innovative Areas grant number 25003006; the correct number is 25113006. This statement has now been amended in all online versions of the Article.
December 26, 2018: Nature Plants
Xiaochun Qin, Xiong Pi, Wenda Wang, Guangye Han, Lixia Zhu, Mingmei Liu, Linpeng Cheng, Jian-Ren Shen, Tingyun Kuang, Sen-Fang Sui
Photosystem I (PSI) is a highly efficient natural light-energy converter, and has diverse light-harvesting antennas associated with its core in different photosynthetic organisms. In green algae, an extremely large light-harvesting complex I (LHCI) captures and transfers energy to the PSI core. Here, we report the structure of PSI-LHCI from a green alga Bryopsis corticulans at 3.49 Å resolution, obtained by single-particle cryo-electron microscopy, which revealed 13 core subunits including subunits characteristic of both prokaryotes and eukaryotes, and 10 light-harvesting complex a (Lhca) antennas that form a double semi-ring and an additional Lhca dimer, including a novel four-transmembrane-helix Lhca...
March 2019: Nature Plants
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