Physiological analysis of leaf senescence of two rice cultivars with different yield potential

被引：22

作者：

Falqueto, Antelmo Ralph ^{[1
]}

Cassol, Daniela ^{[2
]}

de Magalhaes Junior, Ariano Martins ^{[3
]}

de Oliveira, Antonio Costa ^{[4
]}

Bacarin, Marcos Antonio ^{[2
]}

机构：

[1] Univ Fed Espirito Santo, Dept Ciencias Saude Biol & Agr, BR-29932540 Sao Mateus, ES, Brazil

[2] Univ Fed Pelotas, Dept Bot, Inst Biol, BR-96010900 Pelotas, RS, Brazil

[3] Embrapa Clima Temperado, BR-96001970 Pelotas, RS, Brazil

[4] Univ Fed Pelotas, Fac Agron Eliseu Maciel, Dept Fitotecnia, BR-96010900 Pelotas, RS, Brazil

来源：

PESQUISA AGROPECUARIA BRASILEIRA | 2009年 / 44卷 / 07期

关键词：

Oryza sativa; oxygen evolution rate; photochemical quenching; photosystem II; photochemicol efficiency; stay green; CHLOROPHYLL FLUORESCENCE; PHOTOSYNTHETIC CHARACTERISTICS; PHOTOSYSTEM-II; GAS-EXCHANGE; LEAVES; EXPRESSION;

D O I：

10.1590/S0100-204X2009000700007

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The objective of this work was to evaluate the physiological changes that occur in different leaves during the early and late grain-filling stages of two rice genotypes (Oryza sativa subsp. indica, BRS Pelota cultivar, and O. sativa subsp. japonica, BRS Firmeza cultivar), which present differences in grain yield potential. The plants were cultivated in greenhouse. Pigment content, chlorophyll fluorescence, electron transport and oxygen evolution rate were determined in the grain-filling stage, from the first to the forth leaf (top to bottom). Pigment content, photochemical efficiency of photosystem II and electron transport decreased significantly according to the position of leaves in 'BRS Pelota'. The BRS Firmeza cultivar shows higher pigment content and higher activity of the photosynthetic apparatus in comparison to 'BRS Pelota' during the grain-filling stage.

引用

页码：695 / 700

页数：6

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