摘要
以 0 0 5、 0 5、 5和 5 0mg·L-15 氨基乙酰丙酸 (ALA)处理小白菜 ,可以提高叶片净光合速率 ,增加表观量子效率(AQY)和羧化效率 (CE) ,同时降低光补偿点 (LCP)和CO2 补偿点 (CCP) ,但是与AQY和CE增加量相比 ,LCP和CCP下降幅度不大。ALA处理提高叶片暗呼吸速率 ,并显著促进根系的生长 ,但没有增加小白菜植株地上部干物质积累。ALA处理显著提高根系可溶性糖和纤维素含量。推测ALA处理不仅能促进叶片的光合作用 ,还具有促进碳水化合物向地下部运转的作用。
By exogenous application of 5-aminolevulinic acid(ALA,0.05,0.5,5 and 50 mg·L -1 ),leaf photosynthesis of pak-choi was improved,with increased apparent quantum yield(AQY)and carboxylation efficiency (CE),and somewhat decreased light compensation point(LCP)and CO 2 compensation point(CCP).However,there was no significant effect of ALA on shoot dry material accumulation of pak-choi seedlings,which might be associated with increased leaf respiration.The root dry weight,soluble sugars and cellulose of seedlings treated by ALA were significantly higher than that of control.These results showed that ALA treatment improved not only CO 2 fixation but also transportation of carbohydrates from shoots to roots.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2004年第2期34-38,共5页
Journal of Nanjing Agricultural University
基金
教育部留学基金委资助 ( 2 0 0 2 14 )
