不同水分条件对海南龙血树幼苗表型可塑性及生态适应性的影响  

Effects of Water Supply on Phenotypic Plasticity and Ecological Adaptability of Dracaena cambodiana Seedlings

作　　者：孙秀秀 郑道君 王春梅 陈加利 梁振儒 陈宣 SUN Xiu-xiu;ZHENG Dao-jun;WANG Chun-mei(Institute of Tropical Horticulture,Hainan Academy of Agricultural Sciences,Haikou,Hainan 571100;Hainan Key Laboratory for Innovative Development and Utilization of Tropical Special Economic Plants,Haikou,Hainan 571100)

机构地区：[1]海南省农业科学院热带园艺研究所,海南海口571100 [2]海南省热带特种经济植物种质资源创新利用重点实验室,海南海口571100

出　　处：《安徽农业科学》2024年第9期92-95,120,共5页Journal of Anhui Agricultural Sciences

基　　金：海南省自然科学基金青年基金项目(321QN359);国家自然科学基金项目(31360071);2018年度海南省农业科学院农业科技创新专项(龙血树)。

摘　　要：通过盆栽试验探讨濒危植物海南龙血树幼苗对水分响应的表型可塑性,分析其生态适应性。结果表明,海南龙血树幼苗对水分的响应主要在形态指标和生物量方面,除了比叶面积、叶片长宽比和株高外,其他指标均达到显著水平(P<0.05);生物量分配主要与根部性状相关,幼苗叶绿素和类胡萝卜素含量在各处理间无显著差异(P>0.05)。海南龙血树幼苗能够充分利用水分资源,在雨季快速生长,并将更多的生物量分配给根部,有利于度过雨季后严峻的干旱季节。海南龙血树幼苗对水分响应的生存策略具有很强的生态适应性。Response of growth and morphology of Dracaena cambodiana seedlings,a rare and endangered plant,was studied by observing its response to five artificially controlled water supply levels.The results indicated that different levels of water supply significantly affected morphological indices and biomass.Except for specific leaf area,the ratio of leaf length to width and plant height,other indicators reached significant levels(P<0.05).The allocation of biomass is mainly related to root traits,and there is no significant difference in chlorophyll and carotenoid content among different treatments in seedlings.According to the analysis,the seedlings could make full use of water to achieve rapid growth in the short and concentrated rainy season,and allocating more biomass to the root was good for the severe drought season after the rainy season.In summary,the seedlings of Dracaena cambodiana had strong ecological adaptability to the survival strategy of water response.

关 键 词：海南龙血树 幼苗 水分 表型可塑性 生态适应性 

分 类 号：S718.45[农业科学—林学]