|Table of Contents|

Effects of Saline-alkali Stress on Components and Contents of Root Exudates of Phaseolus vulgaris L.

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2021年17
Page:
90-96
Research Field:
Publishing date:

Info

Title:
Effects of Saline-alkali Stress on Components and Contents of Root Exudates of Phaseolus vulgaris L.
Author(s):
YU Song1; 2; YANG Helin1; ZHU Xuetian1; YAN Tianyu1; WANG Hongwei1; YU Lihe1; 2
(1.College of Agriculture,Heilongjiang Bayi Agricultural University,Daqing,Heilongjiang 163319;2.Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement,Daqing,Heilongjiang 163319)
Keywords:
common bean; saline-alkati stress; root exudates; pH; electrical conductivity; organic acid; amino acid; soluble sugar
PACS:
-
DOI:
10.11937/bfyy.20210401
Abstract:
Based on the soil culture method,two common bean varieties (the higher saltine-alkali tolerance variety ‘HYD’and the weaker saltine-alkali tolerance variety ‘JW’) were used as experimental materials.According to the mass percentage of Na2CO3 and NaHCO3 mixing at the specified molar ratio of 1∶9 in the soil,two concentration gradients 0% (control,T0) and 0.4% (T4) were designed,the effects of saline-alkali stress on the components and contents of root exucates of common bean were stuided,in order to provide a scientific theoretical basis for further revealing the rhizosphere ecological mechanism of response and adaptation of common bean to saline-alkali environment,and innovating the cultivation regulation technology for saline-alkali resistance.The results showed that under the treatment without saline-alkali stress,the pH and electrical conductivity of ‘HYD’ root exudates were significantly (P<0.05) lower than that of ‘JW’.After saline-alkali stress treatment,the pH and electrical conductivity of root exudates of two varieties increased.In this experiment,four kinds of organic acids and seventeen kinds of free amino acids were detected in the root exudates,and the components of root exudates of different varieties were the same.Saline-alkali stress significantly changed the content of organic acids in ‘HYD’ and ‘JW’ root exudates,of which acetic acid was the most secreted.Under the same treatment,the total amino acid content and total soluble sugar content in root exudates of ‘HYD’ were higher than that of ‘JW’.Compared with ‘JW’,‘HYD’ had a stronger ability to release organic acids and amino acids,which could effectively change the pH and conductivity,thus improving the saline-alkali rhizosphere environment.

References:

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Last Update: 2021-12-13