MdGH3.6 is targeted by MdMYB94 and plays a negative role in apple water‐deficit stress tolerance

Brassinosteroids (BRs) are plant hormones that play an essential role in plant development and have the ability to protect plants against various environmental stresses, such as low and high temperature, drought, heat, salinity, heavy metal toxicity, and pesticides. Mitigation of stress effects are produced through independent mechanisms or by interaction with other important phytohormones. However, there are few studies in which this property has been reported for BRs analogs. Thus, in this work, the enhancement of drought stress tolerance of A. thaliana was assessed for a series of 2-deoxybrassinosteroid analogs. In addition, the growth-promoting activity in the Rice Lamina Inclination Test (RLIT) was also evaluated. The results show that analog 1 exhibits similar growth activity as brassinolide (BL; used as positive control) in the RLIT bioassay. Interestingly, both compounds increase their activities by a factor of 1.2–1.5 when they are incorporated to polymer micelles formed by Pluronic F-127. On the other hand, tolerance to water deficit stress of Arabidopsis thaliana seedlings was evaluated by determining survival rate and dry weight of seedlings after the recovery period. In both cases, the effect of analog 1 is higher than that exhibited by BL. Additionally, the expression of a subset of drought stress marker genes was evaluated in presence and absence of exogenous applied BRs. Results obtained by qRT-PCR analysis, indicate that transcriptional changes of AtDREBD2A and AtNCED3 genes were more significant in A. thaliana treated with analog 1 in homogeneous solution than in that treated with BL. These changes suggest the activation of alternative pathway in response to water stress deficit. Thus, exogenous application of BRs synthetic analogs could be a potential tool for improvement of crop production under stress conditions.

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Physiological and molecular basis of water-deficit stress tolerance in F1hybrids and their parental lines in rice

Indian Journal of Genetics and Plant Breeding (The) ◽

10.5958/0975-6906.2016.00035.3 ◽

2016 ◽

Vol 76 (2) ◽

pp. 127

Author(s):

Sasmita Pattnaik ◽

Vinod Kumar ◽

Kapil K. Tiwari ◽

Chandra Prakash ◽

Ashutosh Singh ◽

...

Keyword(s):

Stress Tolerance ◽

Water Deficit ◽

Molecular Basis ◽

Water Deficit Stress ◽

Parental Lines

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Foliar application of betaine improves water-deficit stress tolerance in barley (Hordeum vulgare L.)

Plant Growth Regulation ◽

10.1007/s10725-019-00510-5 ◽

2019 ◽

Vol 89 (1) ◽

pp. 109-118 ◽

Cited By ~ 4

Author(s):

Nanbo Wang ◽

Fangbin Cao ◽

Marvin Eusi Ambrose Richmond ◽

Chengwei Qiu ◽

Feibo Wu

Keyword(s):

Hordeum Vulgare ◽

Stress Tolerance ◽

Water Deficit ◽

Foliar Application ◽

Water Deficit Stress ◽

Hordeum Vulgare L

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Water deficit stress tolerance in maize conferred by expression of an isopentenyltransferase (IPT) gene driven by a stress- and maturation-induced promoter

Journal of Biotechnology ◽

10.1016/j.jbiotec.2016.01.014 ◽

2016 ◽

Vol 220 ◽

pp. 66-77 ◽

Cited By ~ 19

Author(s):

Cecilia Décima Oneto ◽

María Elena Otegui ◽

Irene Baroli ◽

Ailin Beznec ◽

Paula Faccio ◽

...

Keyword(s):

Stress Tolerance ◽

Water Deficit ◽

Water Deficit Stress ◽

Ipt Gene

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Delaying chloroplast turnover increases water-deficit stress tolerance through the enhancement of nitrogen assimilation in rice

Journal of Experimental Botany ◽

10.1093/jxb/erx247 ◽

2017 ◽

Vol 69 (4) ◽

pp. 867-878 ◽

Cited By ~ 16

Author(s):

Nir Sade ◽

Kamolchanok Umnajkitikorn ◽

Maria del Mar Rubio Wilhelmi ◽

Matthew Wright ◽

Songhu Wang ◽

...

Keyword(s):

Stress Tolerance ◽

Water Deficit ◽

Nitrogen Assimilation ◽

Water Deficit Stress

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Quantitative monitoring of sucrose, reducing sugar and total sugar dynamics for phenotyping of water-deficit stress tolerance in rice through spectroscopy and chemometrics

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2017.10.076 ◽

2018 ◽

Vol 192 ◽

pp. 41-51 ◽

Cited By ~ 23

Author(s):

Bappa Das ◽

Rabi N. Sahoo ◽

Sourabh Pargal ◽

Gopal Krishna ◽

Rakesh Verma ◽

...

Keyword(s):

Stress Tolerance ◽

Water Deficit ◽

Reducing Sugar ◽

Total Sugar ◽

Water Deficit Stress ◽

Quantitative Monitoring

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Effect of Polyethylene Glycol Induced Water Stress on Germination and Seedling Growth of Wheat (Triticum aestivum)

The Agriculturists ◽

10.3329/agric.v15i1.33431 ◽

2017 ◽

Vol 15 (1) ◽

pp. 81-91 ◽

Cited By ~ 3

Author(s):

MS Rana ◽

MA Hasan ◽

MM Bahadur ◽

MR Islam

Keyword(s):

Polyethylene Glycol ◽

Water Stress ◽

Stress Tolerance ◽

Water Deficit ◽

Seedling Growth ◽

Dry Weight ◽

Stress Sensitivity ◽

Water Deficit Stress ◽

Growth Stages ◽

Wheat Genotypes

The performance of twenty wheat genotypes under Polyethylene Glycol (PEG) induced water stress during germination and early seedling growth stages were tested under three levels of water potential i) Control (Tap water), ii) -2 bars and iii) -4 bar at the Crop Physiology and Ecology Laboratory of Hajee Mohammad Danesh Science and Technology University, Dinajpur during September 2014 to October 2014. Rate of germination and vigor index of all wheat genotypes were delayed with the increment of water stress induced by PEG. Shoot and root lengths and seedling dry weight of 10 days old seedlings were found to be reduced due to the increment of water stress. However, the degree of reduction of these parameters with the increment of water stress was not similar for all wheat genotypes. Stress tolerance index (STI) based on seedling dry weight indicated a wide difference in stress tolerance among the wheat genotypes. At moderate water deficit stress, BARI Gom 25, E 34, E 28 and BAW 1170 showed more stress tolerance and the wheat genotypes- Sourav, E 23 and BAW 1140 showed greater stress sensitivity than the other wheat genotypes. At higher water deficit stress, BARI Gom 25, BARI Gom 28, E 28 and BAW 1170 showed more stress tolerance and the wheat genotypes- Satabdi, Sourav, BARI Gom 26, E 23, E 38, E 24, BAW 1163, BAW 1140 and BAW 1151 showed greater stress sensitivity than the others. Considering both moderate and high water deficit stress, BARI Gom 25, E 28 and BAW 1170 were found as tolerant and Sourav, E 23 and BAW 1140 were found as water deficit stress sensitive wheat genotypes. The Agriculturists 2017; 15(1) 81-91

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Genotypic water-deficit stress responses in durum wheat: association between physiological traits, microRNA regulatory modules and yield components

Functional Plant Biology ◽

10.1071/fp16294 ◽

2017 ◽

Vol 44 (5) ◽

pp. 538 ◽

Cited By ~ 12

Author(s):

Haipei Liu ◽

Amanda J. Able ◽

Jason A. Able

Keyword(s):

Durum Wheat ◽

Stress Tolerance ◽

Water Deficit ◽

Stress Responses ◽

Yield Components ◽

Physiological Responses ◽

Physiological Traits ◽

Water Deficit Stress ◽

Genotypic Differences ◽

Time Points

In Mediterranean environments, water-deficit stress that occurs before anthesis significantly limits durum wheat (Triticum turgidum L. ssp. durum) production. Stress tolerant and stress sensitive durum varieties exhibit genotypic differences in their response to pre-anthesis water-deficit stress as reflected by yield performance, but our knowledge of the mechanisms underlying tolerance is limited. We have previously identified stress responsive durum microRNAs (miRNAs) that could contribute to water-deficit stress tolerance by mediating post-transcriptional silencing of genes that lead to stress adaptation (e.g. miR160 and its targets ARF8 (auxin response factor 8) and ARF18). However, the temporal regulation pattern of miR160-ARFs after induction of pre-anthesis water-deficit stress in sensitive and tolerant varieties remains unknown. Here, the physiological responses of four durum genotypes are described by chlorophyll content, leaf relative water content, and stomatal conductance at seven time-points during water-deficit stress from booting to anthesis. qPCR examination of miR160, ARF8 and ARF18 at these time-points revealed a complex stress responsive regulatory pattern, in the flag leaf and the head, subject to genotype. Harvest components and morphological traits measured at maturity confirmed the stress tolerance level of these four varieties for agronomic performance, and their potential association with the physiological responses. In general, the distinct regulatory pattern of miR160-ARFs among stress tolerant and sensitive durum varieties suggests that miRNA-mediated molecular pathways may contribute to the genotypic differences in the physiological traits, ultimately affecting yield components (e.g. the maintenance of harvest index and grain number).

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