Physiological and Molecular Aspects of Mechanisms Involved in Plant Response to Salt Stress

Tang, Xiaoli; Shao, Hongbo; Ohshima, Hiroyuki

doi:10.1002/9781119075691.ch71

Encyclopedia of Biocolloid and Biointerface Science 2V Set 2016

DOI: 10.1002/9781119075691.ch71

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Physiological and Molecular Aspects of Mechanisms Involved in Plant Response to Salt Stress

Xiaoli Tang

Hongbo Shao

Hiroyuki Ohshima³

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2021

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References 161 publications

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Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila

Ding

2021

Trees

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Elevated salinity is one of the major environmental limitation factors of plant growth and development and salinity stress compromises the production and survival of plantation and urban forests and agricultural crops in the arid, semi-arid, and intertidal zones. Ulmus pumila, a salt-indigenous tree species in Asia and is widely deployed in salt-affected areas in China, and U.pumila is promising for multi-varietal forestry in plantation and urban forests. The comprehensive mechanism of the intraspecific salt tolerance is still not clear yet. Here, we investigated the physiological responses of the salinity stress based on the antioxidant enzyme activities, osmotic adjustments, and gas exchange among salt-tolerant U. pumila genotypes for 100 days under five different NaCl levels (0%, 0.3%, 0.5%, 0.7%, and 0.9% w/v) with natural surroundings and rain shade at age-2. Salt stress decreased height (HR), ground diameter (DR), and dry weight (biomass) were significantly different among genotypes. HR and performance indices were positively correlated with photosynthesis rate (Pn), apparent mesophyll conductance (AMC), and chlorophyll (CHLL) with (r= 0.7 -0.8 ***), but were negatively related to the free proline, sugar, and protein accumulation (r=-0.5 ~ -0.7***). We found that high accumulation of sugars and more activities of SOD enzyme in leaf tissue contribute to the osmotic adjustment and ROS scavenging system under salinity treatment; the sugar content and SOD activity play key roles in U. pumila's tolerance to salt stress, and are promising indicators for U. pumila species ex vitro selections. The ex vitro selection results align with the previous in vitro studies [37] and is promising for the MVF development.

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Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila

Ding

2021

Trees

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Physiological and Molecular Aspects of Mechanisms Involved in Plant Response to Salt Stress

Cited by 1 publication

References 161 publications

Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila

Developing a salinity tolerance indicator for tree varieties at challenging sites and urban forests based on inferences of physiological responses: an example of Ulmus pumila

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