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农学学报

农学学报 ›› 2011, Vol. 1 ›› Issue (9): 1-6.

所属专题： 生物技术； 农业气象

• 农艺科学 生理生化 •    下一篇

干旱胁迫对甜叶菊生理指标及单株干叶产量的影响

任广喜 刘相阳 石岩   

  • 收稿日期:2011-07-14 修回日期:2011-09-30 出版日期:2011-11-20 发布日期:2011-11-20

Effects of Drought Stress on the Physical index and Dry leaf yield of Stevia rebaudina Bertoni

  • Received:2011-07-14 Revised:2011-09-30 Online:2011-11-20 Published:2011-11-20

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摘要：

为了给干旱胁迫条件下的甜叶菊栽培管理提供理论依据，利用温室盆栽法研究了干旱胁迫对不同种质材料甜叶菊生理指标及干叶产量的影响。结果表明：正常水分处理下5份甜叶菊种质材料的可溶性蛋白质含量、相对电导率、丙二醛（MDA）含量、超氧化物歧化酶（SOD）、过氧化物酶（POD）及甜叶菊单株干叶产量不同。随着干旱时间的持续，5份甜叶菊种质材料的可溶性蛋白质含量均表现为下降趋势，仅IS-1在T3（停止灌溉15天）略有上升；5份甜叶菊种质材料相对电导率均出现较平稳的显著增加；IS-1和AL-4叶片MDA的含量随着干旱胁迫时间的持续先降低后升高，而QF-1、‘青甜杂4’及JD-1叶片MDA的含量持续升高；SOD与POD的活性均表现出先升高后降低再升高的变化趋势；5份甜叶菊种质材料的单株干叶产量均出现不同程度的下降趋势。相同处理中不同材料的相同指标变化程度不同，说明其抗旱能力不同：其中IS-1最强，QF-1最弱，其他3份材料的抗旱性顺序分别为：AL-4>‘青甜杂4’>JD-1。

关键词: 马尾松, 马尾松, 产脂量, 树体因子, 相关分析

Abstract:

The effects of drought stress on the physical index and the dry leaf yield in the different Stevia rebaudina Bertoni germplasms of IS-1, QF-1, Qingtianza4, JD-1 and AL-4 was studied with the pot method in greenhouse. The results indicated that the content of soluble protein, the relative electric conductivity, the content of malondiadehyde (MDA), the activities of peroxidase(POD) and superoxide dismutase (SOD) and the dry leaf yield of the stevia germplasms were different and showed different degree changes with the continuing of drought-stress time. The content of soluble protein of the stevia germplasm showed decreasing trend, but that in IS-1 rose in the T3 (without irrigation for 15 days). The relative electric conductivity showed stable and significant increase. The MAD content in the IS-1 and in the AL-4 decreased firstly and then increased, but that in the QF-1, Qingtianza4 and JD-1 increased continually. The dry leaf yield of this stevia germplasm showed decrease in different degree. The different change degree of the diverse stevia dermplasm in the same treatment indicated that drought resistance of the stevia germplasm is different：the drought resistance of the IS-1 is the strongest，the drought resistance of the QF-1 is the weakest，the order of the drought resistance in other stevia germplasm are AL-4>Qingtianza4>JD-1.