摘要
以2年生‘来味里’树莓幼苗为实验材料,进行遮阴处理(2个遮阴强度:T1,自然光强的40%;T2,自然光强的60%,CK,自然光照)。遮阴处理60 d后,测定不同光照环境下植株生长、开花结实、叶片光合特征等形态学、生理学指标。结果表明:T1、T2处理下,树莓叶片Pn值较对照分别降低了28.0%和53.0%。遮光处理的叶片光饱和点(LSP)、光补偿点(LCP)、暗呼吸速率(Rd)和表观最大量子效率(α)较对照明显降低(P<0.05),但T1和T2之间差异不显著(P>0.05)。此外,遮阴处理造成树莓基生枝及蘖根苗的数量明显减少,其中T2处理的基生枝数量仅为对照的1/3;T1和T2处理树莓果实成熟期分别延后了8和20 d。相关性分析结果表明:遮阴条件下,树莓叶片的净光合速率与果实主要特征参数(如果实横径、平均单果重和平均单株座果数)及基生和蘖根苗数显著相关。
In this study,Laiweili raspberry seedlings were used as materials,and treated by different shading intensities（2 treatment groups： group 1（ T1）-40% sunlight; group 2（T2）-60% sunlight; CK-sunlight）.After shading treatments for 60 d,the morphological and physiological parameters（ growth rate,flowering and fruiting,photosynthetic characteristics） were measured under different light intensities. The results showed that Pnvalues of the treated leaves were reduced by 28% for T1 and 53% for T2 as compared with CK. Shading treatments led to significant reductions（ P〈 0. 05） in light saturation point（ LSP）,light compensation point（LCP）,dark respiration rate（Rd） and apparent quantum efficiency（α）. However,there was no significant differences in the above parameters between T1 and T2（P〉 0. 05）. Moreover,the shading treatments also resulted in significant reductions in the number of basal branches and root-sprouting seedlings,of which the number of basal branches of T1 treatment was only one third of CK. The fruit mature period was delayed by 8 d for T1 and 20 d for T2 as compared with CK.
出处
《植物研究》
CAS
CSCD
北大核心
2014年第5期599-603,共5页
Bulletin of Botanical Research
基金
林业公益性行业科研专项(201004068)
国家自然科学基金项目(31300506)
中央高校基础科研业务费专项基金项目(2572014CA24)
关键词
树莓
净光合速率
光饱和点
果实成熟期
基生枝
花期
‘Laiweili＇raspberry
net photosynthetic rate
light saturation point
fruit mature period
basal branch
flowering period
