不同种群小桐子光合及形态特性的比较  

Photosynthetic and morphological traits of different Jatropha curcas populations

作　　者：郑玉龙[1] 类延宝[1] 李扬平[1] 杨成源[1] 廖志勇[1] 张茹[1] 

机构地区：[1]中国科学院西双版纳热带植物园,云南勐腊666303

出　　处：《生态学杂志》2009年第6期1021-1027,共7页Chinese Journal of Ecology

基　　金：中国科学院知识创新工程重要方向资助项目(KSCX2-YW-G-027)

摘　　要：研究了小桐子(Jatropha curcas)9个种群的叶氮分配、光合能力、生物量积累及分配、种子产量等一系列生理及形态特征。结果表明:小桐子叶片的最大光合速率与叶氮在光合机构中的分配系数有显著的正相关关系;小桐子的最终生物量受光合能力和形态特征的共同影响;生物量与种子产量之间没有必然的联系。多数参数在小桐子不同种群之间存在显著差异,表明种群之间存在遗传差异,但对生长环境的适应性不是小桐子种群产生遗传差异的主要原因。与其他8个种群相比,瑞丽种群的各项生理指标、生物量及种子产量均处于较优水平,在今后小桐子的大面积推广及杂交育种时可优先考虑该种源,但对于其适生范围及抗逆能力需要进一步研究。With socio-economic development, energy crisis has become a serious problem in the world. As a potential substitute plant for fossil fuel and a renewable energy, Jatropha curcas has been attracted particular attention. In this paper, a comparative study was made on the leaf nitrogen allocation, photosynthesis, biomass accumulation and allocation, and seed yield of nine J.curcas populations, aimed to provide references for enlarging the planting of this species and for breeding new varieties. The results showed there was a significant positive relationship between the photosynthesis and the fraction of leaf nitrogen allocated to photosynthetic apparatus. The fihal biomass of J. curcas was co-affected by photosynthetic and morphological traits, but biomass had no necessary correlation with seed yield. Most of the photosynthetic and morphological parameters were significantly different among different J. curcas populations, suggesting that there existed genetic difference among the populations. However, the difference in adaptability to growth environment was not the main reason for the genetic difference. Among the test populations, the population from Ruili had better performances in physiology, biomass, and seed yield,being the preferable source for enlarging the planting of J. curcas and for the cross breeding of new varieties. The appropriate growth environment and the stress-tolerant capability of this population needed to be studied further.

关 键 词：小桐子 种群 最大光合速率 生物量分配 

分 类 号：S565.9[农业科学—作物学]