首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2篇
  免费   0篇
  1986年   2篇
排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
KWESIGA  F.; GRACE  J. 《Annals of botany》1986,57(3):283-290
The West African species Khaya senegalensis and Terminalia ivorensiswere grown in a controlled environment, varying the photon fluxdensity in the range 18–610 µmol m–2 s–1and the red/far-red ratio over an appropriate range to simulatethe shade of a tree canopy versus unattenuated daylight. Theshade tolerant seedlings of Khaya were relatively insensitiveto the red/far-red ratio. The light demanding Terminalia wasconsiderably affected: when the ratio was low the specific leafarea was increased and the leaves produced were very much largerin area. Thus, the Leaf Area Ratio was enhanced and the plantsdisplayed an increase in Relative Growth Rate. Khaya, Terminalia, tropical trees, shade, red/far-red ratio  相似文献   
2.
The stomatal conductance and rate of photosynthesis of tropicaltree seedlings are reported (Terminalia ivorensis, T. superba,Triplochiton scleroxylon and Khaya senegalensis). The seedlingswere grown in various light regimes, defined by the photon fluxdensity and red: far-red ratio. Mesophyll conductance and apparentquantum efficiency were calculated. The maximum rates of photosynthesison an area or weight basis depended on the photon flux densityduring growth, being increased by growth at high photon fluxdensity except in the shade tolerant seedlings of K. senegalensis.The stomatal conductance was also highest in leaves which hadbeen grown at high photon flux density. Using plants which hadbeen grown at low photon flux density and contrasting red: far-redratio, it was found that the highest rates of photosynthesiswere attained when the red: far-red ratio was low. The resultsare discussed in relation to what is known of the natural lightclimate, and evaluated in relation to the carbon balance ofseedlings. Terminalia ivorensis, Terminalia superba, Triplochiton scleroxylon, Khaya senegalensis, tropical tree, photosynthesis, stomata, shade, red: far-red  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号