Effects of Drought Stress on Morphological and Physiological Indices of New Coix Varieties in Yunnan  

干旱胁迫对云南薏苡新品种形态和生理指标的影响（英文）

作　　者：FANG Zi-song LONG Hua JIN Long-ying YANG Zhi-qing 方子松;龙华;金隆英;杨志清(云南农业大学农学与生物技术学院,云南昆明650201;云南农业大学云南省药用植物生物学重点实验室,云南昆明650201;云南农业大学西南中药材种质创新与利用国家地方联合工程研究中心,云南昆明650201)

机构地区：[1]College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, PRC [2]The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming 650201, PRC [3]National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials inSouthwestern China, Yunnan Agricultural University, Kunming 650201, PRC

出　　处：《Agricultural Science & Technology》2019年第1期22-29,共8页农业科学与技术（英文版）

基　　金：云南省科技计划项目(2014RE002,2015RA083)~~

摘　　要：In order to study the effects of drought stress on the morphological and physiological indexes of Yunnan Coix at different growth stages, two new varieties of Yunnan Coix Wenyi 4 and Wenyi 5 were used as experimental materials, potted and compared with CK by normal irrigation. Morphological indices such as plant height, stem diameter and physiological indices such as protein, soluble sugar, chlorophyll content and relative conductivity (REC) of the two varieties under drought stress at seedling stage, tillering stage and jointing stage were determined, and data statistics and variance analysis were performed for each index. The results showed that the morphological indices, plant height of Wenyi 4 and Wenyi 5 were significantly affected by drought stress at seedling stage, while the stem diameter was significantly affected by drought stress at seedling and jointing stage. In terms of physiological indices, the relative conductivity, protein and soluble sugar contents of Wenyi 5 increased at a higher degree, whereas chlorophyll content decreased at a higher degree, indicating that Wenyi 5 was greatly affected by drought stress. Through the analysis of drought resistance of the tested materials at different stages by polar ordination method, the results were as follows: jointing stage of Wenyi 5>jointing stage of Wenyi 4>seedling stage of Wenyi 4>seedling stage of Wenyi 5>tillering Stage of Wenyi 4>Tillering Stage of Wenyi 5. For the growth period, the drought resistance was as follows: jointing stage>seedling stage>tillering stage. In conclusion, Wenyi 4 has strong drought resistance and is suitable for droughtresistant cultivation.为了研究云南薏苡新品种在不同生育时期干旱胁迫对薏苡形态和生理指标的影响,本文以文薏4号,文薏5号2个云南薏苡新品种为试验材料,采取盆栽的方法,以正常浇水为对照(CK),测定2个品种分别在苗期、分蘖期和拔节期干旱胁迫后的株高和茎粗等形态指标及蛋白质、可溶性糖、叶绿素含量和相对电导率(REC)等生理指标,并对各项指标进行数据统计和方差分析。结果表明在形态指标方面,文薏4号和文薏5号的株高在苗期受干旱胁迫影响较大,而茎粗在苗期和拔节期均受干旱胁迫影响较大;在生理指标方面,文薏5号的相对电导率、蛋白质和可溶性糖含量增加较多,叶绿素含量减少较多,说明文薏5号受干旱胁迫影响较大。通过极点排序法分析得出供试材料在不同时期抗旱性强弱为:文薏5号拔节期>文薏4号拔节期>文薏4号苗期>文薏5号苗期>文薏4号分蘖期>文薏5号分蘖期,仅从生育时期来看,抗旱性强弱为:拔节期>苗期>分蘖期。综上所述,文薏4号抗旱性较强,适宜抗旱栽培。

关 键 词：COIX Growth period Drought stress Morphological index Physiological index 

分 类 号：S519[农业科学—作物学]