当前位置: 首页 > 文章 > Na~+对渗透胁迫下霸王幼苗光合特性的影响 草业学报 2010,19 (3) 200-205
Position: Home > Articles > Effect of Na~+ on photosynthetic characteristics of Zygophyllum xanthonylom seedlings under osmotic stress Acta Prataculturae Sinica 2010,19 (3) 200-205

Na~+对渗透胁迫下霸王幼苗光合特性的影响

作  者:
马清;楼洁琼;王锁民
单  位:
兰州大学草地农业科技学院
关键词:
Na+;渗透胁迫;霸王幼苗;光合特性
摘  要:
在-0.5MPa渗透胁迫下,研究了Na+对多浆旱生植物霸王幼苗光合特性的影响。结果显示,在渗透胁迫下,50mmol/LNaCl的加入使霸王幼苗的叶面积和叶绿素(a+b)含量分别显著增加了105%和33%,净光合速率(Pn)、气孔导度(Gs)以及磷酸烯醇式丙酮酸羧化酶(PEPCase)活性分别显著提高了115%,90%和180%,而胞间CO2浓度(Ci)显著降低了17%;同时,使PSⅡ的潜在活性(Fv/F0)、原初光能转换效率(Fv/Fm)以及光合电子传递速率(ETR)分别显著提高了15%,5%和11%。以上结果表明,Na+能改善渗透胁迫下霸王幼苗的光合作用,从而提高植株的抗胁迫能力。
译  名:
Effect of Na~+ on photosynthetic characteristics of Zygophyllum xanthonylom seedlings under osmotic stress
作  者:
MA Qing,LOU Jie-qiong,WANG Suo-min (School of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China)
关键词:
Na+;osmotic stress;Zygophyllum xanthoxylum;photosynthetic characters
摘  要:
The effect of Na+ on the photosynthetic characteristics of seedlings of the succulent xerophyte Zygophyllum xanthoxylum were investigated under-0.5 MPa osmotic stress.Under this stress,the leaf area,chlorophyll (a+b) content,net photosynthetic rate (Pn),stomatal conductance (Gs) and phosphoenolpyruvate carboxylase (PEPCase) activity were significantly elevated by 105%,33%,115%,90%,and 180% respectively at 50 mmol/L NaCl,but the intercellular CO2 concentration (Ci) was significantly reduced by 17%.In addition,the potential photosynthetic activity (Fv/F0),primary light energy conversion efficiency (Fv/Fm),and photosynthetic electron transport rate (ETR) of PSⅡ were enhanced by 15%,5%,and 11% respectively.These results indicate that,under-0.5 MPa osmotic stress,Na+ can improve the photosynthesis of Z.xanthoxylum seedlings and enhance the osmotic stress resistance of plants.

相似文章

计量
文章访问数: 8
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊