Read by QxMD icon Read

Plant, Cell & Environment

Sebastian Schneider, Arno Schintlmeister, Manuel Becana, Michael Wagner, Dagmar Woebken, Stefanie Wienkoop
Legume-rhizobia symbioses play a major role in food production for an ever growing human population. In this symbiosis, dinitrogen is reduced ('fixed') to ammonia by the rhizobial nitrogenase enzyme complex and is secreted to the plant host cells, while dicarboxylic acids derived from photosynthetically-produced sucrose are transported into the symbiosomes and serve as respiratory substrates for the bacteroids. The symbiosome membrane contains high levels of SST1 protein, a sulfate transporter. Sulfate is an essential nutrient for all living organisms, but its importance for symbiotic nitrogen fixation and nodule metabolism has long been underestimated...
November 15, 2018: Plant, Cell & Environment
Xu Chen, Lei Shi, Yuqin Chen, Lu Zhu, Dasheng Zhang, Shi Xiao, Asaph Aharoni, Jianxin Shi, Jie Xu
Sepals play important roles in protecting inner floral organs from various stresses and in guaranteeing timely flower opening. However, the exact role of sepals coordinating interior and exterior signals remains elusive. In this study, we functionally characterized a heat shock protein gene, Arabidopsis HSP70-16, in flower opening and mild heat stress response, using combined genetics with anatomic, physiological, chemical, and molecular analyses. We show that HSP70-16 is required for flower opening and mild heat response...
November 13, 2018: Plant, Cell & Environment
Tingting Jing, Na Zhang, Ting Gao, Mingyue Zhao, Jieyang Jin, Yongxian Chen, Miaojing Xu, Xiaochun Wan, Wilfried Schwab, Chuankui Song
Plants emit a variety of volatiles in response to herbivore attack and (Z)-3-hexenol and its glycosides have been shown to function as defense compounds. Although the ability to incorporate and convert (Z)-3-hexenol to glycosides is widely conserved in plants, the enzymes responsible for the glycosylation of (Z)-3-hexenol remained unknown until today. In this study, uridine-diphosphate dependent glycosyltransferase (UGT) candidate genes were selected by correlation analysis and their response to airborne (Z)-3-hexenol, which has been shown to be taken up by the tea plant...
November 13, 2018: Plant, Cell & Environment
Mei Wang, JiYue Qiao, ChenLiang Yu, Hao Chen, ChenDong Sun, LinZhou Huang, ChuanYou Li, Markus Geisler, Qian Qian, De An Jiang, YanHua Qi
In rice, there are five members of the auxin carrier AUXIN1/LIKE AUX1 (AUX1/LAX) family, however, the biological functions of the other four members besides OsAUX1 remains unknown. Here, by using Crispr/cas9 we constructed two independent OsAUX3 knock-down lines, osaux3-1 and osaux3-2, in wild-type rice, Hwayoung (WT/HY) and Dongjin (WT/DJ). osaux3-1 and osaux3-2 have shorter primary roots (PR), decreased lateral root (LR) density and longer root hairs (RH) compared to their WT. OsAUX3 expression in PRs, LRs and RHs further supports that OsAUX3 plays a critical role in the regulation of root development...
November 6, 2018: Plant, Cell & Environment
Luosha Zhang, Xiong Shi, Yutao Zhang, Jiajing Wang, Jingwei Yang, Takashi Ishida, Wenqian Jiang, Xiangyu Han, Jingke Kang, Xuening Wang, Lixia Pan, Shuo Lv, Bing Cao, Yonghong Zhang, Jinbin Wu, Huibin Han, Zhubing Hu, Langjun Cui, Shinichiro Sawa, Junmin He, Guodong Wang
CLE peptides have been implicated in various developmental processes of plants and mediate their responses to environmental stimuli. However, the biological relevance of most CLE genes remains to be functionally characterized. Here we report that CLE9, which is expressed in stomata, acts as an essential regulator in the induction of stomatal closure. Exogenous application of CLE9 peptides or overexpression of CLE9 effectively led to stomatal closure and enhanced drought tolerance, while CLE9 loss-of-function mutants were sensitivity to drought stress...
October 31, 2018: Plant, Cell & Environment
Youngsung Joo, Meredith C Schuman, Jay K Goldberg, Antje Wissgott, Sang-Gyu Kim, Ian T Baldwin
The timing of plant volatile emissions is important for a robust indirect defense response. Green leaf volatiles (GLVs) are emitted by plants upon damage, but can be suppressed by herbivore-associated elicitors; and the abundance and composition of GLVs vary depending on the timing of herbivore attack. We show that the GLV biosynthetic enzyme HYDROPEROXIDE LYASE (HPL) is transcriptionally regulated by the circadian clock in Nicotiana attenuata. In accordance with transcript abundance of NaHPL, GLV aldehyde pools in intact leaves peaked at night, and at subjective night under diurnal and continuous light conditions, respectively...
October 31, 2018: Plant, Cell & Environment
David A Camarena-Pozos, Víctor M Flores-Núñez, Mercedes G López, José López-Bucio, Laila P Partida-Martinez
The plant microbiota can affect host fitness via the emission of microbial volatile organic compounds (mVOCs) that influence growth and development. However, evidence of these molecules and their effects in plants from arid ecosystems is limited. We screened the mVOCs produced by 40 core and representative members of the microbiome of agaves and cacti in their interaction with Arabidopsis thaliana and Nicotiana benthamiana. We used SPME-GC-MS to characterize the chemical diversity of mVOCs and tested the effects of selected compounds on growth and development of model and host plants...
October 31, 2018: Plant, Cell & Environment
Brendon Conlan, Rosemary Birch, Celine Kelso, Sophie Holland, Amanda P De Souza, Stephen P Long, Jennifer L Beck, Spencer M Whitney
The folding and assembly of Rubisco large and small subunits into L8 S8 holoenzyme in chloroplasts involves many auxiliary factors, including the chaperone BSD2. Here we identify apparent intermediary Rubisco-BSD2 assembly complexes in the model C3 -plant tobacco. We show BSD2 and Rubisco content decrease in tandem with leaf age with approximately half of the BSD2 in young leaves (~70 nmol BSD2 protomer.m2 ) stably integrated in putative intermediary Rubisco complexes that account for <0.2% of the L8 S8 pool...
October 30, 2018: Plant, Cell & Environment
Zhen Wang, Yuxiao Shen, Xiao Yang, Qi Pan, Guangying Ma, Manzhu Bao, Bo Zheng, Deqiang Duanmu, Rongcheng Lin, Robert M Larkin, Guogui Ning
Chloroplasts convert solar energy into biologically useful forms of energy by performing photosynthesis. Although light and particular genes are known to promote chloroplast development, little is known about the mechanisms that regulate the tissue- and cell-specificity of chloroplast biogenesis. Thus, the mechanisms that determine whether nonphotosynthetic plastids rather than chloroplasts develop in petals remain largely unexplored. Although heat stress is known to inhibit photosynthesis, we do not know whether heat stress affects chloroplast biogenesis...
October 30, 2018: Plant, Cell & Environment
Wenguang Shi, Yuhong Zhang, Shaoliang Chen, Andrea Polle, Heinz Rennenberg, Zhi-Bin Luo
Uptake, translocation, detoxification, and sequestration of heavy metals (HMs) are key processes in plants to deal with excess amounts of HM. Under natural conditions, plant roots often establish ecto- and/or arbuscular-mycorrhizae with their fungal partners, thereby altering HM accumulation in host plants. This review considers the progress in understanding the physiological and molecular mechanisms involved in HM accumulation in nonmycorrhizal versus mycorrhizal plants. In nonmycorrhizal plants, HM ions in the cells can be detoxified with the aid of several chelators...
October 30, 2018: Plant, Cell & Environment
Dong Zhang, Chunli Jiang, Chenhao Huang, Dong Wen, Jiangnan Lu, Sha Chen, Tianyuan Zhang, Yuhua Shi, Jianping Xue, Wei Ma, Li Xiang, Wei Sun, Shilin Chen
Tartary buckwheat (Fagopyrum tataricum) not only provides a supplement to primary grain crops in China but also has high medicinal value, by virtue of its rich content of flavonoids possessing antioxidant, anti-inflammatory, anticancer properties. Light is an important environmental factor that can regulate the synthesis of plant secondary metabolites. In this study, we treated tartary buckwheat seedlings with different wavelengths of light and found that red and blue light could increase the content of flavonoids and the expression of genes involved in flavonoid synthesis pathways...
October 30, 2018: Plant, Cell & Environment
Erica H Lawrence, Joseph R Stinziano, David T Hanson
The rapid A-Ci response (RACiR) technique alleviates limitations of measuring photosynthetic capacity by reducing the time needed to determine the maximum carboxylation rate (Vcmax ) and electron transport rate (Jmax ) in leaves. Photosynthetic capacity and its relationships with leaf development are important for understanding ecological and agricultural productivity; however, our current understanding is incomplete. Here, we show that RACiR can be used in previous generation gas exchange systems (i.e., the LI-6400) and apply this method to rapidly investigate developmental gradients of photosynthetic capacity in poplar...
October 30, 2018: Plant, Cell & Environment
Monika Bojko, Monika Olchawa-Pajor, Reimund Goss, Susann Schaller-Laudel, Kazimierz Strzałka, Dariusz Latowski
The importance of diadinoxanthin (Ddx) de-epoxidation in the short-term modulation of the temperature effect on photosynthetic membranes of the diatom Phaeodactylum tricornutum was demonstrated by electron paramagnetic resonance (EPR), Laurdan fluorescence spectroscopy and high performance liquid chromatography (HPLC). The 5-SASL spin probe employed for the EPR measurements and Laurdan provided information about the membrane area close to the polar head groups of the membrane lipids, whereas with the 16-SASL spin probe the hydrophobic core, where the fatty acid residues are located, was probed...
October 25, 2018: Plant, Cell & Environment
Lei Chen, Jun Meng, Xiao Li He, Min Zhang, Yu Shi Luan
MicroRNA1916 (miR1916) is one of the non-conserved miRNAs that respond to various stresses in plants, but little has been known at present about its mechanisms in biotic stresses. In this study, the expression of sly-miR1916 in tomato (Solanum lycopersicum) was found to be down-regulated after infection with Phytophthora infestans or Botrytis cinerea. Tomato plants that overexpressed sly-miR1916 displayed significant enhancement in susceptibility to P. infestans and B.cinerea infection, as well as increased tendency to produce reactive oxygen species (ROS)...
October 25, 2018: Plant, Cell & Environment
Giovanna Gramegna, Daniele Rosado, Ana Paula Sánchez Carranza, Aline Bertinatto Cruz, Miguel Simon-Moya, Briardo Llorente, Manuel Rodríguez-Concepcíon, Luciano Freschi, Magdalena Rossi
Tocopherols are important antioxidants exclusively produced in plastids that protect the photosynthetic apparatus from oxidative stress. These compounds with vitamin E activity are also essential dietary nutrients for humans. Although the tocopherol biosynthetic pathway has been elucidated, the mechanisms that regulate tocopherol production and accumulation remain elusive. Here, we investigated the regulatory mechanism underlying tocopherol biosynthesis during ripening in tomato fruits, which are an important source of vitamin E...
October 25, 2018: Plant, Cell & Environment
Mina Ghahremani, Joonho Park, Erin M Anderson, Naomi J Marty-Howard, Robert T Mullen, William C Plaxton
Among 29 predicted Arabidopsis purple acid phosphatases (PAPs), AtPAP26 functions as the principle extra- and intracellular PAP isozyme that is upregulated to recycle and scavenge Pi during Pi-deprivation or leaf senescence. Our companion paper documented the co-purification of a secreted, high-mannose AtPAP26-S2 glycoform with AtGAL1 (At1g78850), a Pi starvation-inducible (PSI) and Galanthus nivalis agglutinin-related (mannose-binding) and apple domain lectin. This study tests the hypothesis that AtGAL1 binds AtPAP26-S2 to modify its enzymatic properties...
October 20, 2018: Plant, Cell & Environment
Justyna Maszkowska, Janusz Dębski, Anna Kulik, Michał Kistowski, Maria Bucholc, Małgorzata Lichocka, Maria Klimecka, Olga Sztatelman, Katarzyna Patrycja Szymańska, Michał Dadlez, Grażyna Dobrowolska
SNF1-related protein kinases 2 (SnRK2s) regulate the plant responses to abiotic stresses, especially water deficits. They are activated in plants subjected to osmotic stress, and some of them are additionally activated in response to enhanced concentrations of abscisic acid (ABA) in plant cells. The SnRK2s that are activated in response to ABA are key elements of ABA signaling that regulate plant acclimation to environmental stresses and ABA-dependent development. Much less is known about the SnRK2s that are not activated by ABA, albeit several studies have shown that these kinases are also involved in response to osmotic stress...
October 19, 2018: Plant, Cell & Environment
Christine H Foyer, Kadambot H M Siddique, Amos P K Tai, Sven Anders, Nandor Fodor, Fuk-Ling Wong, Ndiko Ludidi, Mark A Chapman, Brett J Ferguson, Michael J Considine, Florian Zabel, P V Vara Prasad, Rajeev K Varshney, Henry T Nguyen, Hon-Ming Lam
The superior agronomic and human nutritional properties of grain legumes (pulses) make them an ideal foundation for future sustainable agriculture. Legume-based farming is particularly important in Africa, where small-scale agricultural systems dominate the food production landscape. Legumes provide an inexpensive source of protein and nutrients to African households as well as natural fertilization for the soil. While the consumption of traditionally grown legumes has started to decline, the production of soybeans (Glycine max Merr...
October 17, 2018: Plant, Cell & Environment
Henri E Cuny, Patrick Fonti, Cyrille B K Rathgeber, Georg von Arx, Richard L Peters, David Frank
Conifer trees possess a typical anatomical tree-ring structure characterized by a transition from large and thin-walled earlywood tracheids to narrow and thick-walled latewood tracheids. However, little is known on how this characteristic structure is maintained across contrasting environmental conditions, due to its crucial role to ensure sap ascent and mechanical support. In this study we monitored weekly wood cell formation for up to seven years in two temperate conifer species (i.e.; Picea abies (L.) Karst and Larix decidua Mill...
October 16, 2018: Plant, Cell & Environment
Kouki Hikosaka, Hibiki M Noda
We present a simple model to assess the quantum yield of photochemistry (ΦP ) and CO2 assimilation rate from two parameters that are detectable by remote sensing: chlorophyll (chl) fluorescence and the photochemical reflectance index (PRI). ΦP is expressed as a simple function of the chl fluorescence yield (ΦF ) and non-photochemical quenching (NPQ): ΦP = 1-bΦF (1+NPQ). Because NPQ is known to be related with PRI, ΦP can be remotely assessed from solar-induced fluorescence and the PRI. The CO2 assimilation rate can be assessed from the estimated ΦP value with either the maximum carboxylation rate (Vcmax ), the intercellular CO2 concentration (Ci ) or parameters of the stomatal conductance model...
October 15, 2018: Plant, Cell & Environment
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"