摘要
研究黄秋葵、饭豆、海蓬子、碱蓬和三角叶滨藜5种不同耐盐经济作物对NaCl胁迫的响应,筛选耐盐能力强的品种,对改良盐碱地和提升土地利用率具有重要意义。用不同浓度NaC1溶液进行胁迫处理,测量发芽率、发芽势、发芽指数。结果表明:NaCl胁迫下,不同耐盐经济作物种子发芽率、发芽势和发芽指数均随NaCl浓度的升高而下降。NaCl浓度在0~50 mmol/L时,黄秋葵发芽率最高;NaCl浓度在50~250 mmol/L时,饭豆种子发芽率最高;不同耐盐作物耐盐程度大小依次为:饭豆>黄秋葵>海蓬子>碱蓬>三角叶滨藜。NaCl浓度在250~450 mmol/L时,仅有饭豆发芽率大于20%。当NaCl浓度大于500 mmol/L时,所有耐盐作物几乎都不发芽。综合分析表明,黄秋葵、饭豆均具有很强的抗盐性。黄秋葵在低盐环境下的耐盐性最好,饭豆在高盐环境下的耐盐性最好。
To study the effects of NaCl stress on okra,rice bean,salicornia,suaeda glauca,quinoa triangulata and to select salt tolerance strains,which is very important to improve salinized soil and land efficiency,the seeds were treated with different concentrations of NaCl solution during germination,and germination rate,germination energy,germinating index were measured.The results showed that under NaCl stress,the germination rate,germination energy and germination index were all decreased with increasing concentrations of NaCl.The okra seeds had the highest germination rate when the concentrations of NaCl was 0~50 mmol/L;The rice bean seeds had the highest germination rate when the concentrations of NaCl was 50~250 mmol/L.Comprehensive evaluation indicated that the salt-tolerance order of different cash crops was as follow:rice bean>okra>salicornia>suaeda glauca>quinoa triangulata.Only the germination rate of rice bean exceeded 20%when the concentrations of NaCl was 250~450 mmol/L.They didn’t germinate when the concentrations of NaCl was more than 500 mmol/L.The findings suggested that okra and rice bean seeds exhibited strong resistance to NaCl,the resistance of okra to low salinity was greater than rice bean,and the resistance of rice bean to high salinity was greater than okra.
作者
李源
朱倩倩
许咏梅
LI Yuan;ZHU Qian-qian;XU Yong-mei(Institute of Soil,Fertilizer and Water Saving Agriculture,Xinjiang Academy of Agricultural Sciences,Urumqi Xinjiang 830091)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2020年第2期226-231,共6页
Soil and Fertilizer Sciences in China
基金
国家自然科学基金(41561070)
新疆兵团重大专项(2018AA005)。
关键词
经济作物
新疆
种子
发芽率
cash crop
Xinjiang
seed
germination rate
