Trichoderma-Induced Enhancement of Soybean Seedling Performance in Response to Salt Stress
In this experiment soybean seeds were pre-treated with salt tolerant isolate of Trichoderma harzianum to evaluate the different aspects of seedling growth and metabolism in response to different concentrations of NaCl. Trichoderma isolate was more effective in improving dry weight and root volume of seedlings during mild salt stress. Seedlings obtained from bioprimed seeds had significantly higher leaf greenness, chlorophyll fluorescence, net photosynthesis and stomatal conductance than the control at all stress levels. NaCl-induced membrane damage was alleviated by Trichoderma, especially at 3 dS/m. The biopriming treatment showed lower accumulation of malondialdehyde (MDA) content under saline condition. Highest MDA content was recorded in the control (unprimed) seeds at salinity level of 9 dS/m. A common factor that adversely affects plants under saline conditions is generation of reactive oxygen species (ROS) and we tested the hypothesis that seed biopriming alleviated damages resulting from ROS attack in the stressed plants. Greatest catalase activity was detected in the bioprimed seeds at the salt stress level of 9 dS/m. The activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX) were significantly increased in response to NaCl stress. Seed biopriming enhanced SOD and APX activity averaged over all salinity levels. It could be concluded that seed biopriming with Trichoderma harzianum certainly ameliorated harmful impacts of mild salinity mainly through promotion of early seedling development and antioxidative defence system.
Response of Iranian Rice Recombinant Inbred Lines (Oryza sativa L.) to Salt Stress in Seedling Stage
Study of the morphological genetic diversity of 114 lines, which have been derived from the crosses between Tarom Mahalli and Khazar cultivars, has been performed at seedling stage as completely randomized design at the normal condition and salinity stress of 8 dS.m-1 in a hydroponic system. Significant differences were detected between genotypes for all traits. Mean of comparison demonstrated ...full text
Salinity is one of the most challenging problems that adversely affects growth and development of plants. Therefore, understanding of the mechanisms that enable plants to adapt to salinity stress will ultimately help in the selection of stress tolerant cultivars for exploiting saline soils. The main objective of this study was to examine the effects of NaCl on some physiological and biochemic...full text
Clarification of the metabolic mechanisms underlying salt stress responses in plants will allow further optimization of crop breeding and cultivation to obtain high yields in saline-alkali land. Here, we characterized 68 differential metabolites of cultivated soybean (Glycine max) and wild soybean (Glycine soja) under neutral-salt and alkali-salt stresses using gas chromatography-mass spectrome...full text
Growth and Chemical Composition of Pistachio Seedling Rootstock in Response to Exogenous Polyamines under Salinity Stress
In order to evaluate responses of a pistachio seedling rootstock (Pistacia vera L. cv. Ghazvini) to NaCl induced salinity stress and potential protective role of exogenous spermine and spermidine on NaCl induced salinity stress, a greenhouse experiment was conducted during growing season of 2009. The NaCl treatments, involving 800, 1600, and 3200 mg NaCl per Kg of soil for 90 days, suppressed g...full text
The chloroplast-localized proteins play roles in plant salt stress response, but their mechanisms remain largely unknown. In this study, we screened a yellow leaf mutant, yl1-1, whose shoots exhibited hypersensitivity to salt stress. We mapped YL1 to AT3G57180, which encodes a YqeH-type GTPase. YL1, as a chloroplast stroma-localized protein, could be markedly reduced by high salinity. Upon expo...full text
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volume 7 issue 1
pages 27- 39
publication date 2022-05-22
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