15个甜菜品种对盐碱胁迫的生理响应及耐盐碱性评价

doi:10.12190/j.issn.2096-1197.2020.04.01

Abstract

Abstract: 【Objective】 In order to reveal the physiological response of different sugar beet varieties to saline-alkali stress and screen salt-alkali tolerant varieties.【Methods】 15 main sugar beet varieties were used as materials to simulate the effects of different degrees of salt-alkali stress（control,light,moderate and severe saline-alkali soil）on the growth and physiological indexes of sugar beet seedlings under natural soil conditions.【Results】 Compared with the control,the seedling emergence rate,fresh weight,dry weight and chlorophyll content of 15 sugar beet varieties decreased in varying degrees with the increase of salt-alkali stress.The five varieties of seedling emergence rate decreasing slightly： were MA3001,MA2070,KWS1176,KWS9149,MA079,and the five varieties of fresh weight decreasing slightly： were MA3001,KWS1176,KWS2323,NEI2499,BETA379,and the five varieties of dry weight decreasing slightly：were KWS1176,BETA5043,MA3001,MA079,BETA379.The decreases of MA3001 and KWS1176 were smaller so that these were the salt-alkali tolerant varieties.The plasmalemma permeability and MDA content in leaves of 15 sugar beet varieties increased with the increase of salt-alkali stress，and small the increase ofor the salt-alkali tolerant sugar beet seedlings was smaller.With the increase of salt-alkali stress，the SOD activity of 15 sugar beet varieties was different，and the POD activity of different varieties showed a single peak curve change，and SOD activity and POD activity of salt-alkali tolerant varieties decreased slightly in severe saline-alkali soil.【Conclusion】 MA3001 and KWS1176 are salt-alkali tolerant sugar beet varieties.They can effectively reduce the membrane lipid peroxidation and the plasmalemma permeability of leaves by strengthening the activity of antioxidant enzymes，thereby improving the salt-alkali tolerance of sugar beet seedlings.

Key words: Sugar beet, Saline-alkali soils, Physiological response, Salt-alkali tolerant variety

CLC Number:

Q945.3

HUANG Chunyan, SU Wenbin, GUO Xiaoxia, LI Zhi, JIAN Caiyuan, TIAN Lu, FAN Fuyi, REN Xiaoyun, GONG Qianheng, ZHANG Qiang. Physiological responses and saline-alkali tolerant evaluation of 15 sugar beet varieties to saline-alkali stress[J].Journal of Northern Agriculture, 2020, 48(4): 1-9.

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Physiological responses and saline-alkali tolerant evaluation of 15 sugar beet varieties to saline-alkali stress

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