Study of Effect of NaCl Stress on Aloe vera

doi:10.3321/j.issn:1000-7091.2005.05.018

Abstract

Abstract: In the greenhouse,pot experiment was conducted to study the effect of 100-400mmol/L NaCl on the growth and ion distribution of two-year Aloe vera.The results showed that the dry weight and leaf chlorophyll content of Aloe vera appeared indistinctive difference between treatments of 100mmol/L NaCl and control,the plant dry weight and chlorophyll content showed notable decline under 200 and 400mmol/L NaCl treatment.The root activity of Aloe vera reached the maximum value under 200mmol/L NaCl treatment,and it decreased with the increase of salt concentration;Leaf electrolytic leakage under salt stress was higher than the control and increased with the salt concentration enhancement.Under salt stress,content of Na⁺ and Cl^- increased with the salt concentration,and it appeared the opposite change for the K⁺ and Ca²⁺ content in Aloe vera.Na⁺ was mainly accumulated in the stem of Aloe vera,content of Na⁺ in the leaves and root was lower;Cl^- was mainly accumulated in the leaves and the content in the stem was higher than the root.The content of K⁺ and Ca²⁺ in Aloe vera was lower under salt stress contrast with the control,content of K⁺ in the leaves increased obviously and the Ca²⁺ content decreased.It had lower Na⁺/K⁺ value and stronger transportation ability for K⁺ and Ca²⁺,which were main reasons to explain salt-tolerance of Aloe vera.

Key words: Aloe vera, salt stress, ion distribution

CLC Number:

S682.33

NING Jian-feng, LIU Zhao-pu, LIU Ling, SHAO Jing. Study of Effect of NaCl Stress on Aloe vera[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2005, 20(5): 70-75. doi: 10.3321/j.issn:1000-7091.2005.05.018.

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