干旱胁迫对3种野牡丹科植株形态和生理特性的影响
2017-10-12吴永彬倪建中洪文君代色平张行霈
李 磊,吴永彬,倪建中,刘 文,洪文君,代色平,张行霈
(1.广州市林业和园林科学研究院/广州市景观建筑重点实验室,广东 广州 510405;2.华南农业大学林学与风景园林学院,广东 广州 510642;3.乳源瑶族自治县林业局,广东 乳源 512700;4.广东实验中学,广东 广州 510375)
干旱胁迫对3种野牡丹科植株形态和生理特性的影响
李 磊1,2,3,吴永彬2,倪建中1,刘 文1,洪文君2,代色平1,张行霈4
(1.广州市林业和园林科学研究院/广州市景观建筑重点实验室,广东 广州 510405;2.华南农业大学林学与风景园林学院,广东 广州 510642;3.乳源瑶族自治县林业局,广东 乳源 512700;4.广东实验中学,广东 广州 510375)
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。
野牡丹‘天骄’;角茎野牡丹;翅茎异形木;耐旱性
Abstract: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 var. Teretipetiolata,which peaked under heavy drought stress,while Tibouchina granulosa were up first and then down,which peaked in moderate drough stess(18.1μmol/g). Protein content of the 3 species wereinsensitive 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.
Key words:Melastoma malabathricum ‘Tianjiao’;Tibouchina granulosa;Allomorphia eupteroton var.teretipetiolata;drought resistance
干旱对植物生长发育各个阶段都有影响[1-2],对植物的开花结实也有着重大影响[3-4]。……
