摘要
采用不同浓度NaCl盐对带有内生真菌(E^+)以及不带内生真菌(E^-)的德兰臭草(Melica transsilvanica)种子进行盐胁迫处理,测定德兰臭草种子的萌发特性和幼苗生理指标,结果表明:盐胁迫抑制了德兰臭草种子的萌发以及叶绿素含量的增长,但是低浓度(≤50mmol/L)的盐溶液对德兰臭草根长以及叶绿素含量具有促进作用,E^+植株分别增加了8.65%、2.47%,E^-植株分别增加了7.94%、0.17%;同时盐胁迫也影响了幼苗的生理特性,在高浓度(≥200mmol/L)下E^+植株比E^-植株细胞膜透性含量减少了12.87%;丙二醛含量减少了49.29%;游离脯氨酸含量减少了12.26%,盐胁迫造成了细胞膜的损伤,盐浓度越强,伤害越大,但内生真菌对德兰臭草宿主具有增益作用。
Melica ferent concentrations transsilvan of NaCl, th ica seeds with fungi （E＋ ） and without fungi （ e seed germination characteristics and seedling E ） were stressed with dif- physiological indexes were determined. The results showed that： Salt stress inhibited the Melica transsilvanica seed germination and chlorophyll contents, but low concentration of salt （less than 50 mmol/L） had a promoting effect on radi- cal length and chlorophyll contents of M. transsilvanica, which in E＋ plants were increased by 8.65 G, 2.47%, in E plants were increased by 7. 94%, 0. 17%, At the same time, salt stress also affected the seedlings physiological characteristics, in high concentration of salt （more than 200 mmol/L）, cell membrane permeability of E＋ plants decreased by 12.87% than that of E plant; MDA decreased by 49.29% the free proline decreased by 12.26%, salt stress resulted in the damage of cell membrane, the stronger the salt concentration, the greater the damage was, but the endophytic fungi could benefit seed germina- tion and seedling physiological indexes, the damage was significantly reduced.
作者
张晶晶
安沙舟
施宠
刘辉
杨娇
ZHANG Jing-jing AN Sha-zhou SHI Chong LIU Hui YANG Jiao(College of Pratacultural and Environmental Sciences, Xinjiang Agricultural University, Key Laboratory of Grassland Resources and Ecology of Xinjiang, Urumqi 830052, Chin)
出处
《中国草地学报》
CSCD
北大核心
2017年第2期59-64,共6页
Chinese Journal of Grassland
基金
高等学校博士学科点专项科研基金(20126504110001)资助
关键词
内生真菌
德兰臭草
种子萌发
生理特性
Endophyte
Melica transsilvanica
Seed germination
Physiological characteristics
