|Table of Contents|

Effects of Salt Stress on Growth and Physiological Characteristics of Trichosanthes kirilowii Maxim.Seedlings

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2023年14
Page:
125-132
Research Field:
Publishing date:

Info

Title:
Effects of Salt Stress on Growth and Physiological Characteristics of Trichosanthes kirilowii Maxim.Seedlings
Author(s):
XIN Longfei; SUN Wanhui; LIU Hongyun; ZHANG Li; JI Baoyi; ZHANG Yanling
(College of Agronomy，Xinyang Agriculture and Forestry University，Xinyang，Henan 464000)
Keywords:
Trichosanthes kirilowii Maxim.; salt stress; root system; biomass; physiological characteristics
PACS:
-
DOI:
10.11937/bfyy.20224561
Abstract:
Trichosanthes kirilowii was used as experimental materials，the effects of different concentrations of salt stress (0，0.1，0.2，0.3，0.4，0.5 mol?L-1) on the growth and physiological characteristics of T.kirilowii seedlings were studied with the method of irrigating salt solution to simulate salt stress，in order to provide reference for the exploration of salt resistance mechanism and the promotion and application of saline alkali land.The results showed that with the increase of NaCl concentration，the root surface area，root volume，root mean diameter and total root length of T.kirilowii seedlings decreased gradually，and the plant height and biomass increased first and then decreased.The plant height and biomass were the largest under 0.1 mol?L-1 NaCl.The contents of chlorophyll a，chlorophyll b and total chlorophyll in the leaves of T.kirilowii seedlings were the highest under 0.1 mol?L-1 NaCl，and then decreased gradually，while the content of malondialdehyde increased significantly with the increase of NaCl concentration.After salt stress，the soluble sugar content，soluble protein content，superoxide dismutase activity and peroxidase activity in the leaves of T.kirilowii increased first and then decreased with the increase of NaCl concentration.When the NaCl concentration was higher than 0.4 mol?L-1，the peroxidase activity，soluble sugar content and soluble protein content decreased significantly.In conclusion，under 0.1 mol?L-1 and 0.2 mol?L-1 NaCl， T.kirilowii can improve the osmotic adjustment ability of seedlings to adapt to salt stress by enhancing the activities of antioxidant enzymes such as superoxide dismutase and accumulating osmotic regulators such as soluble sugar.When the NaCl concentration exceeded 0.3 mol?L-1，the photosynthetic pigment content，antioxidant enzyme activity and osmotic regulator substances of T.kirilowii seedlings significantly reduced，and the degree of membrane lipid peroxidation was intensified，which ultimately leaded to the serious inhibition of the growth of T.kirilowii seedlings and the reduction of biomass accumulation.

References:

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Last Update: 2023-08-29