干旱对大豆叶片葫芦巴碱含量和渗透调节的影响

摘要/Abstract

摘要： 以两个抗旱性不同的大豆品种绥农14号和黑农38号为研究材料,研究了土壤干旱胁迫下大豆叶片葫芦巴碱含量的变化和渗透调节能力。结果表明,土壤干旱下两个大豆品种叶片水势、渗透势和压力势降低,且绥农14号叶片的压力势在干旱胁迫下明显高于黑农38号。干旱胁迫下两个大豆品种的渗透调节能力提高。在0~8 d 干旱期间,叶片的葫芦巴碱含量增加较快,脯氨酸含量增加较慢;在8~12 d干旱期间,叶片中葫芦巴碱含量下降,而脯氨酸含量迅速增加。因此,葫芦巴碱在轻度干旱下可能起到渗透调节物质的作用,在严重干旱下该作用减弱。

关键词: 葫芦巴碱, 渗透调节, 干旱, 大豆

Abstract: Taking two soybean (Glycine max(L.) Merrill) varieties with different drought resistance, Heinong No.38' and Suinong No.14' grown in pots as the test material, this paper studied the changes of trigonelline contents and capacity of osmotic adjustment in leaves under soil drought stress. The results showed that water potential, osmotic potential and pressure potential in leaves of two soybean varieties decreased during soil drought stress, and pressure potential in leaves of Suinong No.14' was higher significantly than that of Heinong No.38' during soil drought stress. The capacity of osmotic adjustment in leaves of two soybean varieties under soil drought stress was enhanced. During 0~8 d drought, trigonelline contents in leaves of two soybean varieties increased rapidly, and proline contents in leaves of two soybean varieties increased slowly; While during 8~16 d drought, trigonelline contents in leaves of two soybean varieties decreased, and praline contents in leaves of two soybean varieties increased rapidly. It was suggested that trigonelline increasing as the osmolyte could improve osmotic adjustment under moderate drought stress, and trigonelline decreasing as the osmolyte weakened the contribution to osmotic adjustment.

Key words: trigonelline, osmotic adjustment, drought, Glycine max(L.) Merrill

中图分类号:

Q945.78

王蕊;孙广玉*. 干旱对大豆叶片葫芦巴碱含量和渗透调节的影响[J]. 中国沙漠, 2010, 30(3): 552-555.

WANG Rui;SUN Guang-yu. Effects of Soil Drought on Trigonelline Content and Capacity of Osmotic Adjustment in Leaves of Two Soybean Varieties[J]. JOURNAL OF DESERT RESEARCH, 2010, 30(3): 552-555.

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