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作 者 ：王晓冬;贺国强;赵利群;胡彦波;李长海*

期 刊 ：植物研究 2014年 34卷 5期 页码：599-603

关键词：树莓；净光合速率；光饱和点；果实成熟期；基生枝；

Keywords:‘Laiweili’ raspberry, net photosynthetic rate, light saturation point, fruit mature period, basal branch, flowering period,

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P_n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（R_d）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。

Abstract: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 P_n values 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 (R_d) 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.

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