草业学报Issue(5)：108-116,9.DOI:10.11686/cyxb20150513
硅对 NaCl 胁迫下甜瓜种子萌发及幼苗生长的影响
Effects of exogenous silicon on melon seed germination and the growth of seedlings under NaCl stress
摘要
Abstract
The effects of exogenous silicon on the growth of melon under salt stress were investigated.Seedlings of two melon cultivars (Xueli No.1 and Longqinyinmi)with different salt tolerance were grown with 125 mmol/L NaCl stress Exposure to 125 mmol/L NaCl stress significantly inhibited melon seed germination. Compared with control,treatments with 0.5-1.0 mmol/L exogenous silicon significantly increased seed ger-mination rate,germination energy,germination index,alpha-amylase activity and water absorption and the treatment with 0.75 mmol/L exogenous silicon performed best.In addition,melon seedlings with 0.25-1.00 mmol/L silicon exposed to 125 mmol/L NaCl had significantly increased plant height,leaf area,chlorophyll content,shoot dry weight and root dry weight,compared to controls.Treatment with 0.50 mmol/L was opti-mal for Longqinyinmi,while 0.75 mmol/L gave best results for Xueli No.1.These results indicate that exoge-nous silicon concentration from 0.50 mmol/L to 0.75 mmol/L can promote melon seed germination by enhan-cing alpha-amylase activity and water absorption,and promote seedling growth by increasing chlorophyll con-tent and photosynthesis capacity under salt stress.When the silicon concentration was more than 1.25 mmol/L,there was no effect on the seed germination and growth of seedlings under salt stress.关键词
硅/NaCl 胁迫/种子萌发/幼苗生长/甜瓜Key words
silicon/NaCl stress/seed germination/seedlings growth/melon引用本文复制引用
王玉萍,王映霞,白向利,王小青,张峰..硅对 NaCl 胁迫下甜瓜种子萌发及幼苗生长的影响[J].草业学报,2015,(5):108-116,9.基金项目
国家自然科学基金项目（31060063，31260094），甘肃省自然科学基金项目（0803RJZA051）和甘肃省财政厅项目资助。 （）
