Physiological responses to gradual drought stress in the diploid hybrid Pinus densata and its two parental species

Gao, Dahai; Gao, Qian; Xu, Hongwei; Ma, Fei; Zhao, Changming; Liu, Jianquan

doi:10.1007/s00468-009-0314-3

Cited by 36 publications

(19 citation statements)

References 55 publications

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“…Physiological changes at the cellular level that are associated with drought stress typically include a reduction in plant growth, inhibition of photosynthetic activity, increased osmosis, and changes in carbohydrate metabolism (Xiao et al, 2009). Similar results have been reported in previous studies (Wang et al, 2007;Gao et al, 2009).…”

Section: Discussionsupporting

confidence: 82%

Physiological evaluation of the responses of Larix olgensis families to drought stress and proteomic analysis of the superior family

Zhang

2015

Genet. Mol. Res.

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ABSTRACT. The conifer Larix olgensis has been analyzed to delineate physiological and proteomic changes that occur under drought stress. Studies of the deleterious effects of drought in the larch families have mainly focused on photosynthesis. In the present study, when the intensity of drought was increased, plant height was inhibited as both POD and MDA levels increased, which indicates oxidative stress. Two-dimensional gel electrophoresis analysis detected 23 significantly differentially expressed proteins, of which 18 were analyzed by peptide mass fingerprinting by using MALDI-TOF/TOF. Eight spots were found to be up-regulated, while the other 10 spots were down-regulated during drought stress. The proteins that were induced by drought treatment have been implicated in the physiological changes that occurred. These results could provide additional information that could lead to a better understanding of the molecular basis of drought-sensitivity in larch plants.

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Section: Discussionsupporting

confidence: 82%

Physiological evaluation of the responses of Larix olgensis families to drought stress and proteomic analysis of the superior family

Zhang

2015

Genet. Mol. Res.

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“…This indicates when one antioxidant system is inhibited then the plant exhibits another antioxidant defense system to face the adverse challenges by oxidative stress [85]. Increase in MDHAR and DHAR activities in response to salt and drought stresses were also reported [44,83,[86][87][88]. Importantly, heat pre-treatment had no significant influence on MDHAR activity.…”

Section: Discussionmentioning

confidence: 86%

Heat-shock positively modulates oxidative protection of salt and drought-stressed mustard (Brassica campestris L.) seedlings

Hossain¹,

Mostofa²,

Fujita³

2013

J Plant Sci Mol Breed

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ResearchOpen AccessHeat-shock positively modulates oxidative protection of salt and drought-stressed mustard (Brassica campestris L.) seedlings AbstractA large number of studies have shown the existence of cross-tolerance in plants, but the exact physiological and biochemical mechanism(s) is poorly understood. In this study, heat-shock (42 °C, 5 h) induced salinity and drought tolerance and possible involvement of antioxidative and glyoxalase systems were investigated in mustard (Brassica campestris L.) seedlings. Seven-day-old seedlings were subjected to salt (150 mM NaCl, 48 h) and drought stress (induced by 20% PEG, 48 h) with or without heat pretreatment. Both salt and drought stresses led to a severe oxidative stress as indicated by profound increases in hydrogen peroxide (H 2 O 2 ) and malondialdehyde (MDA) levels. A significant increase in ascorbate (AsA) content was observed in response to drought stress but the glutathione (GSH) and glutathione disulfide (GSSG) contents increased in response to both salt and drought stress. The GSH/GSSG ratio decreased significantly in response to drought stress. Salt stress led to a significant increases of ascorbate peroxidase (APX), glutathione reductase (GR), glutathione S-transferases (GST) activities; whereas, catalase (CAT) and glyoxalase II (Gly II) activities decreased. Drought stress resulted in a significant increase in monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), glutathione peroxidase (GPX) and glyoxalase I (Gly I) activities; whereas, CAT and Gly II activities decreased. Seedlings primed with heat-shock positively modulates the activities of APX, DHAR, GR, GST, GPX, CAT, Gly I and Gly II, and maintained lower levels of GSSG, H 2 O 2 and MDA as compared to the control mostly also salt and drought-stressed seedlings. Our results showed that a retention of the imprint of previous stress exposure (heat-shock) protects the plants from salt and drought-induced oxidative stress by stimulation of antioxidative and glyoxalase defense systems.

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“…Previous studies have shown that drought tolerant cultivars generally have enhanced constitutive antioxidant enzyme activity under drought stress in comparison with sensitive cultivars. This has been demonstrated under water-limiting stress in numerous plant species, such as Pinus densata (Gao et al, 2009), mulberry (Guha et al, 2010) and woody karst species . Little research, however, has been carried out on gene expression levels associated with antioxidant defense systems.…”

Section: Introductionmentioning

confidence: 97%

Changes in leaf morphology, antioxidant activity and photosynthesis capacity in two different drought-tolerant cultivars of chrysanthemum during and after water stress

Sun

Zeng

et al. 2013

Scientia Horticulturae

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Physiological responses to gradual drought stress in the diploid hybrid Pinus densata and its two parental species

Cited by 36 publications

References 55 publications

Physiological evaluation of the responses of Larix olgensis families to drought stress and proteomic analysis of the superior family

Physiological evaluation of the responses of Larix olgensis families to drought stress and proteomic analysis of the superior family

Heat-shock positively modulates oxidative protection of salt and drought-stressed mustard (Brassica campestris L.) seedlings

Changes in leaf morphology, antioxidant activity and photosynthesis capacity in two different drought-tolerant cultivars of chrysanthemum during and after water stress

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