期刊
SOUTH AFRICAN JOURNAL OF BOTANY
卷 104, 期 -, 页码 244-248出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.sajb.2016.03.001
关键词
Lotus japonicus; phosphate; biomass; photosynthesis; respiration
Photosynthesis is an integral part of plant metabolism for the production of carbohydrates, which are in turn used for plant biomass production. Phosphate (P) plays an important role in photosynthesis and the production of carbohydrates; however, it is also one of the most difficult macronutrients for plants to obtain. The effects of P deprivation on photosynthesis and respiration in the model legume Lotus japonicus were studied using gas exchange measurements and the A: Ci model of photosynthesis. Phosphate deprivation decreased plant biomass, overall photosynthetic reactions, photosynthesis: respiration ratio and triose-P utilization. The root: shoot ratio, the hallmark of P deprivation, did not show any significant increase under P deprivation, which is in contrast to the bulk of previous findings. Consistent allocation to both roots and shoots could explain this phenomenon. Direct photosynthetic and respiration measurements did not show any significant decrease under P deprivation, although the effect of P on photosynthesis has been shown to be largely species-specific. The ratio of photosynthesis to respiration, however, showed a marked decrease and therefore was affected by P deprivation. Changes in photosynthesis, respiration and triose-P utilization explain the decrease in plant biomass. (C) 2016 SAAB. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据