Effects of the `Stay Green' Genotype GGd1d1d2d2 on Leaf Gas Exchange, Dry Matter Accumulation and Seed Yield in Soybean (Glycine max L. Merr.)

The homozygous combination of the recessive mutations d1 and d2, i.e. d1d1d2d2, causes retention of chlorophyll, chlorophyll-binding proteins and Rubisco in senescing leaves of soybean (Glycine max L. Merr.). Together with G (a gene that preserves only chlorophyll in the mature seed coat), d1d1d2d2...

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Detalles Bibliográficos
Autores principales: Luquez, Virginia Martha Cristina, Guiamet, Juan José
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Agrarias
Glycine max L. Merr., photosynthesis, seed yield, senescence, soybean, stay green, stomatal conductance
Plantas
Soja
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/74999
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-74999
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Agrarias
Glycine max L. Merr., photosynthesis, seed yield, senescence, soybean, stay green, stomatal conductance
Plantas
Soja
spellingShingle Ciencias Agrarias
Glycine max L. Merr., photosynthesis, seed yield, senescence, soybean, stay green, stomatal conductance
Plantas
Soja
Luquez, Virginia Martha Cristina
Guiamet, Juan José
Effects of the `Stay Green' Genotype GGd1d1d2d2 on Leaf Gas Exchange, Dry Matter Accumulation and Seed Yield in Soybean (Glycine max L. Merr.)
topic_facet Ciencias Agrarias
Glycine max L. Merr., photosynthesis, seed yield, senescence, soybean, stay green, stomatal conductance
Plantas
Soja
description The homozygous combination of the recessive mutations d1 and d2, i.e. d1d1d2d2, causes retention of chlorophyll, chlorophyll-binding proteins and Rubisco in senescing leaves of soybean (Glycine max L. Merr.). Together with G (a gene that preserves only chlorophyll in the mature seed coat), d1d1d2d2 prolonged photosynthetic activity and increased seed yield in growth chamber experiments. The objective of this work was to test the effects of GGd1d1d2d2 (abbreviated to Gd1d2) on leaf gas exchange, growth and seed yield in soybean plants cultured outdoors during the normal growing season. Despite preservation of the photosynthetic machinery in Gd1d2, photosynthesis during the seed filling period was similar in Gd1d2 and its near-isogenic wild type line `Clark'. The main factor limiting photosynthesis in the mutant appeared to be stomatal conductance, which was substantially lower in Gd1d2 than in `Clark'. In Gd1d2 the rate of dry matter accumulation during the seed ®lling period was similar or lower than in the wild type. At maturity, Gd1d2 had fewer nodes, fruiting nodes, fruits and seeds per plant, and therefore its seed yield was reduced by 10±20% compared to `Clark'. Thus, pleiotropic effects of G, d1 and/or d2 affecting stomatal conductance and seed number appear to be major limitations to the yield potential of Gd1d2. These pleiotropic effects suggest that G, d1 and/or d2 have regulatory functions in addition to the control of chloroplast disassembly during senescence.
format Articulo
Articulo
author Luquez, Virginia Martha Cristina
Guiamet, Juan José
author_facet Luquez, Virginia Martha Cristina
Guiamet, Juan José
author_sort Luquez, Virginia Martha Cristina
title Effects of the `Stay Green' Genotype GGd1d1d2d2 on Leaf Gas Exchange, Dry Matter Accumulation and Seed Yield in Soybean (Glycine max L. Merr.)
title_short Effects of the `Stay Green' Genotype GGd1d1d2d2 on Leaf Gas Exchange, Dry Matter Accumulation and Seed Yield in Soybean (Glycine max L. Merr.)
title_full Effects of the `Stay Green' Genotype GGd1d1d2d2 on Leaf Gas Exchange, Dry Matter Accumulation and Seed Yield in Soybean (Glycine max L. Merr.)
title_fullStr Effects of the `Stay Green' Genotype GGd1d1d2d2 on Leaf Gas Exchange, Dry Matter Accumulation and Seed Yield in Soybean (Glycine max L. Merr.)
title_full_unstemmed Effects of the `Stay Green' Genotype GGd1d1d2d2 on Leaf Gas Exchange, Dry Matter Accumulation and Seed Yield in Soybean (Glycine max L. Merr.)
title_sort effects of the `stay green' genotype ggd1d1d2d2 on leaf gas exchange, dry matter accumulation and seed yield in soybean (glycine max l. merr.)
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/74999
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AT guiametjuanjose effectsofthestaygreengenotypeggd1d1d2d2onleafgasexchangedrymatteraccumulationandseedyieldinsoybeanglycinemaxlmerr
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