Effects of Salt Stresses on Seed Germination and Growth of Tomato Seedlings

doi:10.3321/j.issn:1000-7091.2006.05.007

Abstract

Abstract: Effects of NaCl stress on seed germination,growth and ionic absorption and distribution of tomato seedlings were studied.Results showed that 25-100 mmol/L NaCl didn't decrease seed germination rate,but delayed the date of seed germination.125-225 mmol/L NaCl obviously decreased seed germination rate and no seed germinated during 250-300 mmol/L.25-300 mmol/L NaCl significantly inhibited seedling growth and decreased dry matter accumulation.Na⁺ was mainly accumulated in stem and root of the seedlings and with lower content in leaves;Cl^- was mainly distributed in stem.K⁺ content in leaves exposed to salinity increased remarkabledly,and absorption of S-(K,Na) in root and transportation of S-(K,Na) in leaves were uniformly promoted obviously.It suggested that higher selectivity of tomato to K⁺ during ion absorption and transportion made tomato with salt-tolerance.

Key words: Salt stress, Tomato, Germination, Ion selectivity, Absorption, Transportion

CLC Number:

S641.2

SU Shi, LIAN Wei-wei, YANG Wen-jie, ZHENG Qing-song. Effects of Salt Stresses on Seed Germination and Growth of Tomato Seedlings[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2006, 21(5): 24-27. doi: 10.3321/j.issn:1000-7091.2006.05.007.

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