Correlation between Light Quality and Photosynthetic Characteristics of Leaves in Canopy of Apple Tree
High-resolution miniature fiber optic spectrometer CI-700AB/HR2000 (Ocean optics, USA)which can measure wavelength from 290nm to HOOnm was used to study light components in canopy of golden delicious apple tree. The results showed that ultraviolet-B (UV-B, 290nm-320nm),uItraviolet-A(UV-A,320nm-400nm), purple light(PL, 400nm-420nm), blue light(BL, 420nm- 492nm), red light(RL, 622nm-750nm) and visible light(VL, 400nm-750nm) increased from inside to out and bottom to up in the canopy ,and the differences were significant. Contrarily, green light(GL, 492nm-577nm) decreased in that way. Infrared ray(IR, 750nm-ll60nm) first increased then decreased. Net photosynthetic rate, transpiration rate and stomatal conductance of leaves in canopy increased from inside to out and bottom to up. UV-B, UV-A, PL, BL, RL and VL took on significant positive correlations with these photosynthetic characteristics; GL presented significant negative correlation with the photosynthetic characteristics; correlation between IR and the three characteristics was also negative but unapparent. In summation, light quality influenced photosynthesis synthetically and remarkably.
correlation canopy light quality photosynthetic characteristics
Liu Wei Su Chunjiang Zhang Guanglun
Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu China & Graduate Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Water Resources Ministr Horticulture School,Sichuan Agricultural University. Yaan China.
国际会议
2009 Academic Conference on Horticulture Science and Technology(2009园艺科学与技术学术会议 CHST 2009)
北京
英文
165-168
2009-12-12（万方平台首次上网日期，不代表论文的发表时间）