期刊
PLANTS-BASEL
卷 10, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/plants10081615
关键词
drought stress; mulberry; leaf gas exchange; water use efficiency; osmolytes accumulation
资金
- Offices of Research, Innovation and Commercialization (ORIC) [A/C AO5213]
- University of Agriculture Faisalabad, Pakistan
- Universiti Putra Malaysia
The study aimed to evaluate the water stress tolerance of young saplings of C. erectus and M. alba under controlled conditions. Results showed that C. erectus saplings depicted a better tolerance to medium water stress due to an effective antioxidative enzyme system, while M. alba exhibited poorer performance and lower antioxidative enzyme concentrations.
Mitigating climate change requires the identification of tree species that can tolerate water stress with fewer negative impacts on plant productivity. Therefore, the study aimed to evaluate the water stress tolerance of young saplings of C. erectus and M. alba under three soil water deficit treatments (control, CK, 90% field capacity, FC, medium stress MS, 60% FC and high stress, HS, 30% FC) under controlled conditions. Results showed that leaf and stem dry weight decreased significantly in both species under MS and HS. However, root dry weight and root/shoot ratio increased, and total dry weight remained similar to CK under MS in C. erectus saplings. Stomatal conductance, CO2 assimilation rate decreased, and intrinsic water use efficiency increased significantly in both species under MS and HS treatments. The concentration of hydrogen peroxide, superoxide radical, malondialdehyde and electrolyte leakage increased in both the species under soil water deficit but was highest in M. alba. The concentration of antioxidative enzymes like superoxide dismutase, peroxidase, catalase, and ascorbate peroxidase also increased in both species under MS and HS but was highest in C. erectus. Therefore, results suggest that C. erectus saplings depicted a better tolerance to MS due to an effective antioxidative enzyme system.
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