Effect of Seed Soaking With Salicylic Acid and α-Naphthaleneacetic Acid on Drought Resistance of Winter Wheat

doi:10.3969/j.issn.1000-6362.2014.02.007

Abstract

Abstract: Effect of SA and NAA on the winter wheat(Aikang58) seedling were studied by comparing the growth and physiological characteristics of seedling in different treatment There were four treatments，namely soaked in distilled water(CK)，salicylic acid(SA)，α-naphthaleneacetic acid (NAA) and the mixture of salicylic acid and α-naphthaleneacetic acid (SA+NAA)The experiment was conducted in the petri dish Seeds of the contrast check were always cultured in distilled water while others were firstly cultured in distilled water for 5 days to accomplish germination and accumulate certain biomass and then in PEG solution (15%) for 4 days to simulate drought stress The results showed that under distilled water condition，SA (0.5mmol/L) could enhance seedling growth rate and NAA (20mg/kg) could increase root/shoot ratio of the wheat seedling SA+NAA showed advantages as a mixture Under osmotic stress condition，NAA and SA+NAA could increase the biomass of the wheat seedling，SA and SA+NAA could improve plant water status and decrease the electrolyte leakage.As seed soaking agent，SA and NAA could increase root/shoot ratio and the biomass of wheat seeding，alleviate the damage of osmotic stress and enhance the drought resistance of wheat seedlings. The effect of SA+NAA was better than SA or NAA separately

Key words: Salicylic acid(SA), α-Naphthaleneacetic acid(NAA), Winter wheat, Plant growth regulator, Drought resistance

TANG Xiaochuan，ZHANG Yuancheng，ZHONG Xiuli，BAI Wenbo，LV Guohua，SONG Jiqing. Effect of Seed Soaking With Salicylic Acid and α-Naphthaleneacetic Acid on Drought Resistance of Winter Wheat[J]. Chinese Journal of Agrometeorology, 2014, 35(02): 162-167.

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