摘要
为探索芦荟对微咸水灌溉栽培的适应性,研究不同盐浓度对其生长和离子吸收分配的影响。结果表明,长期(120天)以含盐溶液灌溉栽培,盐浓度达200mmol/L NaCl显著抑制芦荟生长,100mmol/L NaCl对芦荟生长的抑制作用显著减轻,50mmol/L NaCl不抑制芦荟生长。同时,以50mmol/L NaCl溶液灌溉对芦荟盐分离子吸收分配影响轻微,但盐浓度达100mmol/L NaCl对芦荟影响显著:根、茎、叶中K+含量显著下降,Na+、Cl-含量显著增大,K+/Na+大幅减小。X-射线能谱分析结果进一步表明,叶片贮水组织是芦荟积累盐分离子的重要部位,但100mmol/L NaCl胁迫下芦荟根尖和叶片细胞中的离子平衡受到显著干扰。结果说明,芦荟适于用微咸水灌溉栽培,叶片贮水组织在缓解其盐胁迫中可起重要作用。
To explore the adaptability of irrigating aloe with weakly brine water,the effects of different concentration salinity stresses on growth,ion absorption and distribution of aloe plants were investigated.Experimental results showed that irrigation with 200 mmol/L NaCl for 120 d significantly retarded aloe growth,but the negative effects of irrigating aloe with 100 mmol/L NaCl on aloe growth were significantly relieved,even irrigating with 50 mmol/L NaCl did not retard aloe growth.The effects of irrigating with 50 mmol/L NaCl on ion absorption,transportation and distribution of aloe plants were not significant,but irrigating with 100 mmol/L NaCl were significant：K ＋ contents of root,stem and leaf significantly decreased,Na ＋ and Cl-content significantly increased,K ＋/Na ＋ ratio significantly decreased.X-ray microanalysis results further showed that leaf aqueous was a main part of accumulating salt ion but ion homeostasis in root and leaf cells of aloe plants were significantly interrupted under 100 mmol/L NaCl stress.The experiment results suggested that Aloe vera L.was suitable to be irrigated with weakly brine water,and leaf aqueous tissue played important roles in the accumulating salt ion and alleviating salt stress.
出处
《中国农学通报》
CSCD
2012年第25期172-178,共7页
Chinese Agricultural Science Bulletin
基金
江苏省高校自然科学研究计划(KJD06210063)
肇庆学院第四轮重点建设学科(植物学)专项资金
关键词
芦荟
微咸水灌溉
盐胁迫
生长
盐分离子
X-射线能谱
Aloe vera L.
irrigation with weakly brine water
salt stress
growth
salt ion
X-ray microanalysis
