摘要
为了对海南岛野生海马齿种质资源进行收集和系统评价,沿海南岛东线和西线进行5次环岛采样,从海南岛11个市县收集到16个代表性地区的野生海马齿种质材料,并对这些海马齿种质的地理分布、生长环境及伴生植物等进行了系统性调查研究。通过对收集的海马齿种质资源分布特点进行分析,发现海马齿主要分布在平均海拔7.4 m左右海陆交汇处的沙滩上,主要位于海南本岛的18°14′~20°05′N和108°39′~110°59′E区域内。另外,观察到海马齿的主要伴生植物共计27种。为了筛选耐盐性较强的海马齿种质,进一步比较分析了这16个地区的野生海马齿在不同浓度盐胁迫下的形态和生理变化特性,并运用主成分分析方法对这些海马齿的耐盐性进行综合评估,发现海口市江南城和文昌市清澜港两处的海马齿耐盐性更强,而从儋州市洋浦新英湾和陵水黎族自治县盐尽村两处获得的海马齿耐盐性较弱。据现有资料所知,这是首次对海南岛野生海马齿种质资源进行系统性调查搜集和耐盐性比较评估,研究结果为后续研究海马齿极端耐盐分子机制及挖掘优良耐盐基因提供了宝贵试验材料并奠定了研究基础。
In order to collect and evaluate the wild germplasm resource for Sesuvium portulacastrum(L.)L.in the Hainan Island,we conducted five times of sample investigation in the coastal areas around the Hainan Island through eastern and western lines.Sixteen wild populations of S.portulacastrum(L.)L.were found from 11 cities or counties.We further collected information of the geographical distribution,growth environment,and associated plants for these S.portulacastrum(L.)L.germplasms.By analyzing their distribution characteristics,we found that S.portulacastrum(L.)L.was mainly distributed in beach and coastal areas with an average elevation about 7.4 m,ranging from north latitude 18°14′-20°05′N to east longitude 108°39′-110°59′E.27 associated plants for S.portulacastrum(L.)L.were observed.We further analyzed the morphological and physiological characteristics of these plants under different salt conditions,followed by the principal component analysis to evaluate their salt tolerance ability.The wild germplasms collecting from Jiangnancheng in Haikou City and Qinglan Port of Wenchang City showed higher salt tolerance,whereas the samples from Yangpu Xinyingwan in Danzhou City and Yanjin Village in Lingshui Li Autonomous County were more salt-sensitive.Altogether,this study achieved a systematic investigation of the wild S.portulacastrum(L.)L.germplasm resource in Hainan Island,and found several wild germplasm resource which served as valuable materials to unlock the molecular mechanism for salt tolerance in S.portulacastrum(L.)L..
作者
阮雪玉
丁国华
陈玉凯
司婷婷
欧苏曼
赵芳
郑文炜
王旭初
RUAN Xue-yu;DING Guo-hua;CHEN Yu-kai;SI Ting-ting;Ousmane Ahmat Souleymane;ZHAO Fang;ZHENG Wen-wei;WANG Xu-chu(College of Life Sciences,Hainan Normal University,Haikou 571158)
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2022年第3期691-705,共15页
Journal of Plant Genetic Resources
基金
海南省重大科技计划项目(ZDKJ202008)
海南省高层次人才项目(2019RC200)。
关键词
海马齿
盐生植物
海南岛
种质资源
地理分布
耐盐生理
Sesuvium portulacastrum(L.)L.
halophytes
Hainan Island
germplasm resources
geographical distribution
salt-tolerant physiology
