期刊论文

Influence of different light intensity on the growth, diurnal change of photosynthesis and chlorophyll fluorescence of tung tree seedling

中文

中南林业科技大学学报

1673-923X

2018

38

8

35-42,50

10.14067/j.cnki.1673-923x.2018.08.006

“十三五”国家重点研发计划项目

本校为第一机构

为探讨不同光照强度对油桐幼苗生长、叶片气体交换及叶绿体荧光参数的影响,采用盆栽试验,设置了4种光照条件光强度100%(L1)、光强度75%(L2)、光强度50%(L3)、光强度20%(L4),分别在遮阴2个月、3个月测定了幼苗的生长、叶绿素含量、光合日变化及叶绿素荧光参数的变化。结果表明:(1)在L3的透光条件下,油桐幼苗苗高显著增加,但地径随着遮阴强度的增加而逐渐降低(P < 0.05);(2)随着光照强度的降低,叶绿素a(Chl a)、叶绿素b(Chl b)和叶绿素总量(Chl a+b)先增加后降低,说明适当的遮阴有利于叶绿素的合成;(3)随着光照强度的降低,油桐的净光合速率(P_n)、气孔导度(G_s)、最大光化学效率(F_v/F_m)、表现光...

To elucidate the matter distributions and gas exchange of leaves under different light intensity of tung tree seedlings, using pot experiment, set up four light conditions full light(L1), 75% light intensity(L2), 50% light intensity(L3), 20% light intensity(L4). We detected the changes of growth, chlorophyll content, diurnal variation and chlorophyll fluorescence parameters of shade in 2 months, 3 months, respectively. Our detection shows that:(1)The growth of tung tree seedlings significantly increased under L3 shade condition, whereas the intense of shade induced contribute to diameter decre...