EFFECT OF PHOTOSYNTHETIC ENHANCEMENT ON PHOTO-RESPIRATION IN SINAPIS-ALBA

被引：6

作者：

NILSEN, S ^{[1
]}

HAUGSTAD, M ^{[1
]}

HOLMEN, AT ^{[1
]}

机构：

[1] UNIV OSLO,BOT LAB,OSLO,NORWAY

来源：

PHYSIOLOGIA PLANTARUM | 1979年 / 47卷 / 01期

关键词：

D O I：

10.1111/j.1399-3054.1979.tb06505.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

In Sinapis alba, the Emerson enhancement effect, measured as CO2 uptake, was significantly lower in an O2‐free atmosphere than in normal air. Photorespiration, when measured as 14CO2 release after a period of 14C‐photosynthetic labeling in white or monochromatic light, was reduced during photosynthetic enhancement. The 14C‐glycolate pool and the 14C‐labeled amino acids associated with the glycolale pathway (glutamate, glycine and serine) decreased during photosynthetic enhancement when Pholosyslem I was ‘overexcited’. This demonstrates that photosynthesis and photorespiration are oxygen dependent and that photorespiration is wavelength dependent in Sinapis alba. The effect of oxygen on pholosynthetic enhancement and photorespiraion, as well as the effect of wavelength on these processes suggest that light is involved not only in the production of glycolate, but also in its further metabolism. It seems that Photosystem I is a key factor in the regulation of glycolate metabolism. Furthermore, the product from the consumption of glycolate in a reaction associated with Pholosystem 1 does not seem to be metabolized via the glycolate pathway. Copyright © 1979, Wiley Blackwell. All rights reserved

引用

页码：19 / 24

页数：6

共 22 条

[1] EFFECTS OF CO2, O2 AND TEMPERATURE ON A HIGH-AFFINITY FORM OF RIBULOSE DIPHOSPHATE CARBOXYLASE-OXYGENASE FROM SPINACH [J].