摘要
以3种野牡丹科植物为材料,研究土壤干旱胁迫对植株形态及生理特性的影响,并用隶属函数法对其抗旱性进行综合评价。结果表明,3种植物的叶片相对电导率和脯氨酸含量随着土壤干旱胁迫程度的增加呈上升趋势;野牡丹‘天骄’和翅茎异形木MDA含量呈上升趋势,在重度干旱胁迫时达到最大值,而角茎野牡丹则表现出先上升后下降趋势,在中度胁迫时达最大值(18.1 μmol/g)。3种植物的可溶性蛋白含量对干旱胁迫不敏感,而可溶性糖含量则表现出先下降后上升趋势,在轻度干旱胁迫时达最小值,在重度干旱胁迫时达最大值。隶属函数分析结果表明,翅茎异形木和野牡丹‘天骄’的耐旱性较强,角茎野牡丹的耐旱性较弱。
Effects of drought stress on the morphology and physiological characteristics were investigated, selecting 3 species of Melastomataceae as experimental materials. With fuzzy menbership function value method, the capability for drougt resistance of 3 Melastomataceae species were comprehensive evaluated. The results indicated： the relative conductivity and proline content of all 3 species showed an increasing trend with the increase of soil drought stree. The MDA content were up of Melastoma malabathricum ＇Tianjiao＇ and Allomorphia eupteroton vat. Teretipetiolata, which peaked under heavy drought stress, while Tibouchina granulosa were up first and then down, which peaked in moderate drough stess （ 18.1 μmol/g ） . Protein content of the 3 species were insensitive to drought stress. The soluble sugar content increased first and then increased, which was at lowest volume under slight drough and peaked in heavy drought stress. The result of membership function analysis showed that A. eupteroton var. teretipetiolata and M. malabathricum ＇Tianjiao＇ had is stronger drought tolerance, and T. granulosa had weak drought tolerance.
出处
《广东农业科学》
CAS
2017年第6期49-56,F0003,共9页
Guangdong Agricultural Sciences
基金
广州省科技计划项目(2014A030304007)
广州市科技计划项目(201705040006)
关键词
野牡丹'天骄’
角茎野牡丹
翅茎异形木
耐旱性
Melastoma malabathricum ＇Tianjiao＇
Tibouchina granulosa
AUomorphia eupteroton var.teretipetiolata
drought resistance
