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- Title
不同基因型海岛棉根系形态参数对混合盐碱胁迫的响应.
- Authors
陈振; 张巨松; 严青青; 杨培; 张玮涛
- Abstract
【Objective】 The purpose of this paper is to reveal the response mechanism of root indexes of different salt-tolerant island cotton seedlings to saline-alkali stress in the hope of providing scientific theoretical basis for breeding and saline-alkali tolerant planting of island cotton in Xinjiang, China. 【Method】 The salt mixture of neutral salt mixed salt (neutral salt) and basic salt mixed salt (alkaline salt) was simulated by mixing 1∶1 with a mixture of NaCl, Na2SO4, NaCl and NaHCO3. When the total salt concentration (Na+) was 0, 120, 180, 240 mmol/L., the neutral and alkaline salt stresses on root morphology as well as the relationship between root morphology were analyzed using four island cotton cultivars (salt-sensitive cultivar Xinhai 48,weak salt-resistance cultivar xinhai31, maderate salt-resistance cultivar Xinhai 43 and salt-resistance cultivar Xinhai 35) as materials. 【Result】 The results showed that differences existed in the response of root morphology of island cotton (Gossypium hirsutum L.) to neutral and alkaline salts. When the neutral salt concentration was 180 mmol/L, the total length of the roots of different salt-tolerant species of sea-island cotton was not significantly different from that of the control, and Xinhai 31 and Xinhai 35 were 18% and 5.97% higher than those of the control, respectively. Under the treatment of alkaline salt 120 mmol/L and 180 mmol/L, the total root length of Xinhai 35, Xinhai 43 and Xinhai 48 was significantly reduced by 38.24%-46.32%, 64.25%-75.58% and 39.91%-71.47%, respectively. When the neutral salt concentration was between 180 and 240 mmol/L, the root length, root surface area and root volume of different salt-tolerant species of island cotton increased to different extents. When the alkaline salt concentration was between 120 and 180 mmol/L, the root length, root surface area and root volume of different salt-tolerant species of island cotton were reduced to different extents. 【Conclusions 】 Low concentration of neutral and alkaline salt increased fine root length, fine root area and fine root volume of different salt-tolerant varieties of island cotton to varying degrees, but had no significant inhibitory effect on medium and coarse root. The total root length, total surface area and total volume of island cotton were significantly reduced under neutral and alkaline salt stresses, alkaline salt had a greater effect on the total root length. Alkaline salt mainly reduced the total root length by inhibiting the elongation of fine root.
- Publication
Xinjiang Agricultural Sciences, 2019, Vol 56, Issue 11, p1961
- ISSN
1001-4330
- Publication type
Article
- DOI
10.6048/j.issn.1001-4330.2019.11.001