黄花钓钟柳（玄参科）花朵的碳平衡

The carbon balance of flowers of Diplacus aurantiacus (Scrophulariaceae).

作者信息

Williams K, Koch G W, Mooney H A

机构信息

Department of Biological Sciences, Stanford University, 94305, Stanford, CA, USA.

出版信息

Oecologia. 1985 Jul;66(4):530-535. doi: 10.1007/BF00379345.

DOI:10.1007/BF00379345

PMID:28310794

Abstract

Measurements and modeling of photosynthesis, respiration and growth in flowers of Diplacus aurantiacus, a semidrought-deciduous shrub, indicate that they can provide 18%-25% of their total carbon requirements through photosynthesis of flower parts. Daily photosynthetic carbon fixation exceeds daily respiratory CO loss during most non-fruiting stages of development. However, this carbon gain fails to meet the requirements for new biomass construction during bud growth and corolla expansion. During fruiting stages, insufficient carbon is fixed to fully supply either respiration or growth.The calyx performs most of the flower's photosynthesis throughout the life of the flower. However, during stages of fruit development, the contribution of the ovary to flower photosynthesis may equal that of the calyx.

摘要

对半干旱落叶灌木桔黄双管花花朵的光合作用、呼吸作用和生长进行的测量与建模表明，它们可以通过花器官的光合作用满足其18%-25%的总碳需求。在大多数非结果发育阶段，每日光合碳固定量超过每日呼吸作用的二氧化碳损失量。然而，在芽生长和花冠扩展期间，这种碳增益无法满足新生物量构建的需求。在结果阶段，固定的碳不足以充分供应呼吸作用或生长所需。在花的整个生命周期中，花萼承担了大部分的光合作用。然而，在果实发育阶段，子房对花光合作用的贡献可能与花萼相当。