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Bulletin of Botanical Research ›› 2014, Vol. 34 ›› Issue (5): 599-603.doi: 10.7525/j.issn.1673-5102.2014.05.004

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Effects of Shading on the Photosynthesis Characteristics and Fruit Traits of Laiweili Raspberry

WANG Xiao-Dong;HE Guo-Qiang;ZHAO Li-Qun;HU Yan-Bo;LI Chang-Hai*   

  1. 1.Heilongjiang Forest Botanical Garden,Harbin 150040;2.Heilongjiang Institute of Tobacco Science,Mudanjiang 157011;3.College of Life Science,Northeast Forest University,Harbin 150040
  • Received:1900-01-01 Revised:1900-01-01 Online:2014-09-20 Published:2015-03-19
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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 Pn 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 (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.

Key words: ‘Laiweili&rsquo, raspberry;net photosynthetic rate;light saturation point;fruit mature period;basal branch;flowering period

CLC Number: