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https://www.readbyqxmd.com/read/29228360/dissecting-the-rootstock-control-of-scion-transpiration-using-model-assisted-analyses-in-grapevine
#1
Anthony Peccoux, Brian Loveys, Junqi Zhu, Gregory A Gambetta, Serge Delrot, Philippe Vivin, Hans R Schultz, Nathalie Ollat, Zhanwu Dai
How rootstocks contribute to the control of scion transpiration under drought is poorly understood. We investigated the role of root characteristics, hydraulic conductance and chemical signals (abscisic acid, ABA) in the response of stomatal conductance (gs) and transpiration (E) to drought in Cabernet Sauvignon (Vitis vinifera) grafted onto drought-sensitive (Vitis riparia) and drought-tolerant (Vitis berlandieri × Vitis rupestris 110R) rootstocks. All combinations showed a concomitant reduction in gs and E, and an increase in xylem sap ABA concentration during the drought cycle...
December 8, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29228055/transcriptional-profiling-of-sugarcane-leaves-and-roots-under-progressive-osmotic-stress-reveals-a-regulated-coordination-of-gene-expression-in-a-spatiotemporal-manner
#2
Alejandro Pereira-Santana, Edyciel J Alvarado-Robledo, Jesus A Zamora-Briseño, Jorge T Ayala-Sumuano, Victor M Gonzalez-Mendoza, Francisco Espadas-Gil, Luis D Alcaraz, Enrique Castaño, Miguel A Keb-Llanes, Felipe Sanchez-Teyer, Luis Carlos Rodriguez-Zapata
Sugarcane is one of the most important crops worldwide and is a key plant for the global production of sucrose. Sugarcane cultivation is severely affected by drought stress and it is considered as the major limiting factor for their productivity. In recent years, this plant has been subjected to intensive research focused on improving its resilience against water scarcity; particularly the molecular mechanisms in response to drought stress have become an underlying issue for its improvement. To better understand water stress and the molecular mechanisms we performed a de novo transcriptomic assembly of sugarcane (var...
2017: PloS One
https://www.readbyqxmd.com/read/29227949/a-cbl-interacting-protein-kinase-tacipk27-confers-drought-tolerance-and-exogenous-aba-sensitivity-in-transgenic-arabidopsis
#3
Yan Wang, Tingting Li, Shanita Judith John, Mingjie Chen, Junli Chang, Guangxiao Yang, Guangyuan He
Drought is one of the major environmental stresses to plants. The calcium sensor, calcineurin B-like (CBL) proteins, and their interacting protein kinases (CIPK) play important roles in responding to abiotic stresses. In this study, we functionally characterized a CIPK gene from Triticum aestivum designated TaCIPK27. The transcriptional levels of TaCIPK27 were increased both in roots and leaves after treatment with polyethylene glycol 8000, abscisic acid and H2O2. Besides, TaCIPK27 interacted with AtCBL1, AtCBL3, AtCBL4, AtCBL5 and AtCBL9 in yeast two-hybrid assays...
December 1, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29223878/constitutive-gibberellin-response-in-grafted-tomato-modulates-root-to-shoot-signaling-under-drought-stress
#4
Lucas Aparecido Gaion, Carolina Cristina Monteiro, Flávio José Rodrigues Cruz, Davi Rodrigo Rossatto, Isabel López-Díaz, Esther Carrera, Joni Esrom Lima, Lázaro Eustáquio Pereira Peres, Rogério Falleiros Carvalho
Plants are sessile organisms that must perceive and respond to various environmental constraints throughout their life cycle. Among these constraints, drought stress has become the main limiting factor to crop production around the world. Water deprivation is perceived primarily by the roots, which efficiently signal the shoot to trigger drought responses in order to maximize a plant's ability to survive. In this study, the tomato (Solanum lycopersicum L.) mutant procera (pro), with a constitutive response to gibberellin (GA), and its near isogenic line cv...
December 6, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29223343/biotic-factors-that-induce-the-tomato-ve1-r-gene
#5
Christian Danve Castroverde, Xin Xu, Ross N Nazar, Jane Robb
In tomato, Verticillium resistance is determined by the Ve gene locus encoding two leucine-rich repeat-receptor-like proteins (Ve1, Ve2). The resistance function usually is attributed to Ve1 alone, with two known alleles: Ve1, encoding a resistance protein, and ve1, with a premature stop codon encoding a truncated product. We have examined further Ve-gene expression in resistant and susceptible near-isolines of Verticillium-infected Craigella tomatoes, using both quantitative RT-PCR and an alternative RFLP assay...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223333/constitutive-expression-of-brassica-juncea-annexin-annbj2-confers-salt-tolerance-and-glucose-and-aba-insensitivity-in-mustard-transgenic-plants
#6
Israr Ahmed, Deepanker Yadav, Pawan Shukla, T V Vineeth, P C Sharma, P B Kirti
Annexins belong to a plasma membrane binding (in a calcium dependent manner), multi-gene family of proteins, which play ameliorating roles in biotic and abiotic stresses. The expression of annexin AnnBj2 of Indian mustard is tissue specific with higher expression in roots and under treatments with sodium chloride and abscisic acid (ABA) at seedling stage. The effect of constitutive expression of AnnBj2 in mustard was analyzed in detail. AnnBj2 OE (over expression) plants exhibited insensitivity to ABA, glucose and sodium chloride...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223067/dissection-of-resistance-to-microdochium-nivale-in-lolium-multiflorum-festuca-arundinacea-introgression-forms
#7
Agnieszka Płażek, Ewa Pociecha, Adam Augustyniak, Katarzyna Masajada, Michał Dziurka, Joanna Majka, Dawid Perlikowski, Izabela Pawłowicz, Arkadiusz Kosmala
The potential of resistance to Microdochium nivale is still not recognized for numerous plant species. The forage grasses of Lolium-Festuca complex are important for grass-biomass production in the temperate regions. Lolium multiflorum is a grass with a high forage quality and productivity but also a relatively low resistance to M. nivale. On the contrary, F. arundinacea has a higher potential of resistance but simultaneously a significantly lower forage quality. These two species cross with each other and the intergeneric hybrids possess complementary characters of both genera...
December 5, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29223066/overexpression-of-the-maize-e3-ubiquitin-ligase-gene-zmairp4-enhances-drought-stress-tolerance-in-arabidopsis
#8
Liang Yang, Lintao Wu, Wei Chang, Zhi Li, Mingjun Miao, Yuejian Li, Junpin Yang, Zhibin Liu, Jun Tan
Ubiquitin-mediated protein degradation plays a crucial role in enabling plants to effectively and efficiently cope with environmental stresses. The E3 ligases have emerged as a central component of the ubiquitination pathway and modulate plant response to abiotic stresses. However, few such studies have been reported in maize. In this study, a C3HC4-type RING finger E3 ligase in maize, ZmAIRP4 (Zea mays Abscisic acid [ABA]-Insensitive RING Protein 4), which is an ortholog of AtAIRP4, was isolated by reverse transcription polymerase chain reaction with specific primers, and its functions in tolerance to drought stress were described...
December 5, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29222611/kiwifruit-svp2-controls-developmental-and-drought-stress-pathways
#9
Rongmei Wu, Tianchi Wang, Ben A W Warren, Susan J Thomson, Andrew C Allan, Richard C Macknight, Erika Varkonyi-Gasic
Genome-wide targets of Actinidia chinensis SVP2 confirm roles in ABA- and dehydration-mediated growth repression and reveal a conservation in mechanism of action between SVP genes of taxonomically distant Arabidopsis and a woody perennial kiwifruit. The molecular mechanisms underlying growth and dormancy in woody perennials are largely unknown. In Arabidopsis, the MADS-box transcription factor SHORT VEGETATIVE PHASE (SVP) plays a key role in the progression from vegetative to floral development, and in woody perennials SVP-like genes are also proposed to be involved in controlling dormancy...
December 8, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29219729/drought-stress-responses-in-maize-are-diminished-by-piriformospora-indica
#10
Wenying Zhang, Jun Wang, Le Xu, Aiai Wang, Lan Huang, Hewei Du, Lijuan Qiu, Ralf Oelmüller
As an endophytic fungus of Sebacinales, Piriformospora indica promotes plant growth and resistance to abiotic stress, including drought. Colonization of maize roots promoted the leaf size, root length and number of tap roots. Under drought stress, the maize seedlings profited from the presence of the fungus and performed visibly better than the uncolonized controls. To identify genes and biological processes involved in growth promotion and drought tolerance conferred by P. indica, the root transcriptome of colonized and uncolonized seedlings was analyzed 0, 6 and 12 h after drought stress (20% polyethylene glycol 6000)...
December 8, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29214486/metabolism-mediated-induction-of-zinc-tolerance-in-brassica-rapa-by-burkholderia-cepacia-cs2-1
#11
Sang-Mo Kang, Raheem Shahzad, Saqib Bilal, Abdul Latif Khan, Young-Hyun You, Won-Hee Lee, Hee-La Ryu, Ko-Eun Lee, In-Jung Lee
Brassica rapa (Chinese cabbage) is an essential component of traditional Korean food. However, the crop is often subject to zinc (Zn+) toxicity from contaminated irrigation water, which, as a result, compromises plant growth and production, as well as the health of human consumers. The present study investigated the bioaccumulation of Zn+ by Burkholderia cepacia CS2-1 and its effect on the heavy metal tolerance of Chinese cabbage. Strain CS2-1 was identified and characterized on the basis of 16S rRNA sequences and phylogenetic analysis...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29214380/differential-expression-of-gibberellin-and-abscisic-acid-related-genes-implies-their-roles-in-the-bud-activity-dormancy-transition-of-tea-plants
#12
Chuan Yue, Hongli Cao, Xinyuan Hao, Jianming Zeng, Wenjun Qian, Yuqiong Guo, Naixing Ye, Yajun Yang, Xinchao Wang
Thirty genes involved in GA and ABA metabolism and signalling were identified, and the expression profiles indicated that they play crucial roles in the bud activity-dormancy transition in tea plants. Gibberellin (GA) and abscisic acid (ABA) are fundamental phytohormones that extensively regulate plant growth and development, especially bud dormancy and sprouting transition in perennial plants. However, there is little information on GA- and ABA-related genes and their expression profiles during the activity-dormancy transition in tea plants...
December 6, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/29212542/a-framework-to-find-the-logic-backbone-of-a-biological-network
#13
Parul Maheshwari, Réka Albert
BACKGROUND: Cellular behaviors are governed by interaction networks among biomolecules, for example gene regulatory and signal transduction networks. An often used dynamic modeling framework for these networks, Boolean modeling, can obtain their attractors (which correspond to cell types and behaviors) and their trajectories from an initial state (e.g. a resting state) to the attractors, for example in response to an external signal. The existing methods however do not elucidate the causal relationships between distant nodes in the network...
December 6, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/29211806/screening-and-identification-of-key-genes-regulating-fall-dormancy-in-alfalfa-leaves
#14
Hongqi Du, Yinghua Shi, Defeng Li, Wenna Fan, Guoqiang Wang, Chengzhang Wang
Fall dormancy (FD) determines the adaptation of an alfalfa variety and affects alfalfa production and quality. However, the molecular mechanism underlying FD remains poorly understood. Here, 44 genes regulating FD were identified by comparison of the transcriptomes from leaves of Maverick (fall-dormant alfalfa) and CUF101(non-fall-dormant), during FD and non-FD and were classified them depending on their function. The transcription of IAA-amino acid hydrolase ILR1-like 1, abscisic acid receptor PYL8, and monogalactosyldiacylglycerol synthase-3 in Maverick leaves was regulated by daylength and temperature, and the transcription of the abscisic acid receptor PYL8 was mainly affected by daylength...
2017: PloS One
https://www.readbyqxmd.com/read/29210003/abscisic-acid-insensitive-4-transcription-factor-is-an-important-player-in-the-response-of-arabidopsis-thaliana-to-two-spotted-spider-mite-tetranychus-urticae-feeding
#15
Anna Barczak-Brzyżek, Małgorzata Kiełkiewicz, Magdalena Górecka, Karol Kot, Barbara Karpińska, Marcin Filipecki
Plants growing in constantly changeable environmental conditions are compelled to evolve regulatory mechanisms to cope with biotic and abiotic stresses. Effective defence to invaders is largely connected with phytohormone regulation, resulting in the production of numerous defensive proteins and specialized metabolites. In our work, we elucidated the role of the Abscisic Acid Insensitive 4 (ABI4) transcription factor in the plant response to the two-spotted spider mite (TSSM). This polyphagous mite is one of the most destructive herbivores, which sucks mesophyll cells of numerous crop and wild plants...
December 5, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29209339/overexpression-of-socyp85a1-a-spinach-cytochrome-p450-gene-in-transgenic-tobacco-enhances-root-development-and-drought-stress-tolerance
#16
Fangmeng Duan, Jun Ding, Dongsun Lee, Xueli Lu, Yuqi Feng, Wenwen Song
Brassinosteroids (BRs) play an essential role in plant growth, development, and responses to diverse abiotic stresses. However, previous studies mainly analyzed how exogenous BRs influenced plant physiological reactions to drought stress, therefore, genetic evidences for the endogenous BRs-mediated regulation of plant responses still remain elusive. In this study, a key BRs biosynthetic gene, SoCYP85A1 was cloned from Spinacia oleracea, which has a complete open reading frame of 1,392 bp encoding a 464 amino acid peptide and shares high sequence similarities with CYP85A1 from other plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29205921/the-dioxygenase-gim2-functions-in-seed-germination-by-altering-gibberellin-production-in-arabidopsis
#17
Wei Xiong, Tiantian Ye, Xuan Yao, Xiong Liu, Sheng Ma, Xi Chen, Ming-Luan Chen, Yu-Qi Feng, Yan Wu
The phytohormones gibberellic acid (GA) and abscisic acid (ABA) antagonistically control seed germination. High levels of GA favor seed germination, whereas high levels of ABA hinder this process. The direct relationship between GA biosynthesis and seed germination ability need further investigation. Here, we identified the ABA-insensitive gain-of-function mutant germination insensitive to ABA mutant 2 (gim2) by screening a population of XVE T-DNA-tagged mutant lines. Based on two loss-of-function gim2-ko mutant lines, the disruption of GIM2 function caused a delay in seed germination...
December 4, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29204077/a-functional-genomic-perspective-on-drought-signalling-and-its-crosstalk-with-phytohormone-mediated-signalling-pathways-in-plants
#18
REVIEW
Shalini Tiwari, Charu Lata, Puneet Singh Chauhan, Vivek Prasad, Manoj Prasad
Introduction: Drought stress is one of the most important abiotic stresses that negatively influence crop performance and productivity. Plants acclimatize to drought stress conditions through altered molecular, biochemical and physiological responses. Gene and/or protein expression and regulation are thought to be modulated upon stress perception and signal transduction for providing requisite endurance to plants.Plant growth regulators or phytohormones are important molecules required for various biological processes in plants and are also central to stress signalling pathways...
December 2017: Current Genomics
https://www.readbyqxmd.com/read/29195232/kaolin-modulates-aba-and-iaa-dynamics-and-physiology-of-grapevine-under-mediterranean-summer-stress
#19
L-T Dinis, S Bernardo, A Luzio, G Pinto, M Meijón, M Pintó-Marijuan, A Cotado, C Correia, J Moutinho-Pereira
The foliar exogenous application of kaolin, a radiation-reflecting inert mineral, has proven to be an effective short-term climate change mitigation strategy for Mediterranean vineyards. In this work, we address the hypothesis that kaolin could improve both the hormonal dynamics and physiological responses of grapevines growing in Douro Region, northern Portugal. For this purpose, the leaf water potential, gas exchange and chlorophyll a fluorescence parameters were monitored, as well as the abscisic acid (ABA) and indole-3-acetic acid (IAA) quantification and immunolocalization were assessed...
November 23, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29195231/early-response-to-salt-ions-in-maize-zea-mays-l
#20
Christoph-Martin Geilfus, Jutta Ludwig-Müller, Gyöngyi Bárdos, Christian Zörb
Abscisic acid (ABA) regulates leaf growth and transpiration rate of plants exposed to salt stress. Despite the known fact that cell dehydration is instrumental for the modulation of ABA concentrations when NaCl is high in the external environment, it was never tested as to whether sodium (Na) or chlorine (Cl) also modulate ABA concentrations. To answer this question, a hydroponic study on maize (Zea mays) was established, by exposing plants to 50mM of sodium glucosamide or glucosamine chloride. The effect of both ions on ABA was investigated in an early stage before (i) the salt ions accumulated to toxic tissue concentrations and before (ii) cells dehydrated...
November 24, 2017: Journal of Plant Physiology
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