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Effects of NaCl Stress on Seed Germination of Lagerstroemia indica L.

Chen Yan

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Abstract

The effects of salt stress of different concentration NaCl on seed germination of Lagerstroemia indica L.in Petri dish were studied.The results showed the decrease happened in germination rate,germination index,simplified vigor index,height of seedling,length of root,root top ratio in length,area and chlorophyll content of cotyledon under the stress of NaCl with a gradually-increasing concentration.The electric conductivity of exudates seeds increased.The POD activity showed a singlet curve which reached the peak value at 0.1% NaCl and then went down significantly.Only did the growth of seedlings stressed by 0.1% NaCl continued growing when the stress was removed,whereas other seedling stopped growing of seeds couldn't germination.

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What this paper is about

The effects of salt stress of different concentration NaCl on seed germination of Lagerstroemia indica L.in Petri dish were studied.The results showed the decrease happened in germination rate,germination index,simplified vigor index,height of seedling,length of root,root top ratio in length,area and chlorophyll content of cotyledon under the stress of NaCl with a gradually-increasing concentration.The electric conductivity of exudates seeds increased.The POD activity showed a singlet curve which reached the peak value at 0.1% NaCl and then went down significantly.Only did the growth of seedlings stressed by 0.1% NaCl continued growing when the stress was removed,whereas other seedling stopped growing of seeds couldn't germination.

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Available abstract

The effects of salt stress of different concentration NaCl on seed germination of Lagerstroemia indica L.in Petri dish were studied.The results showed the decrease happened in germination rate,germination index,simplified vigor index,height of seedling,length of root,root top ratio in length,area and chlorophyll content of cotyledon under the stress of NaCl with a gradually-increasing concentration.The electric conductivity of exudates seeds increased.The POD activity showed a singlet curve which reached the peak value at 0.1% NaCl and then went down significantly.Only did the growth of seedlings stressed by 0.1% NaCl continued growing when the stress was removed,whereas other seedling stopped growing of seeds couldn't germination.

Key concepts: Germination, Seedling, Point of delivery, Petri dish, Horticulture, Cotyledon, Biology, Botany

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