Effects of Environmental Conditions and Canopy Composition on Photosynthesis and Photosynthate Translocation in Fruiting Sweet Cherry Trees
Effects of Environmental Conditions and Canopy Composition on Photosynthesis and Photosynthate Translocation in Fruiting Sweet Cherry Trees
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环境条件和冠层组成对结果甜樱桃树光合作用和光合产物转运的影响
DOI：
10.2525/ecb1963.39.59
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Tamaki
中科院分区：
文献类型：
--
作者：
S. Kondo;Y. Hayata;M. Tamaki
田间甜樱桃（Prunus avium L.）开花后40d的净光合速率在上午9点达到峰值，为17.2 μmol CO2 m-2 s-1，随后逐渐下降，可能与叶片温度升高和相对湿度降低有关。结果表明，果树有结果的刺上叶片的净光合速率高于果树和非果树无结果的刺上叶片的净光合速率。有结果的果树直叶叶绿素浓度也高于无结果的果树直叶。因此，樱桃树结果的影响可能是局部的，而不是整个树。当期芽叶的净光合速率高于距叶。在当前的茎和距叶中，13c -光合产物都倾向于从13c -供血的叶片大量迁移到靠近果实的地方。而当除13c -供给量叶片外的所有叶片都脱落时，13c -光合产物几乎均匀地转运到每个果实上，而不考虑果实的位置，因为每个果实的来源受到脱落的限制。
The net photosynthetic rate of the current shoot leaves of sweet cherries (Prunus avium L.) at 40d after full bloom (DAFB) in the field peaked at 9 A.M. at 17.2, μmol CO2 m-2 s-1, and then decreased gradually, probably due to the increase in leaf temperature and the decrease of relative humidity. The net photosynthetic rate in leaves on spurs with fruit on fruiting trees was higher than the rate in leaves on spurs without fruit on fruiting trees and non-fruiting trees. Chlorophyll concentration in spur leaves with fruit on fruiting trees was also higher than that in spur leaves without fruit on fruiting trees. Therefore, the effect of fruiting in cherry trees may appear locally rather than wholly in the trees. The net photosynthetic rate in the current shoot leaves was higher than that in the spur leaves. 13C-photosynthates in both current shoot and spur leaves tended to translocate abundantly closer to the fruit from 13C-fed leaves. Whereas when all leaves were defoliated except for 13C-fed leaves, 13C-photosynthates were translocated almost uniformly to each fruit irrespective of the fruiting position because the source for each fruit was limited by the defoliation.