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

Luquez, Virginia Martha Cristina; Guiamet, Juan José

doi:10.1006/anbo.2000.1324

Cited by 29 publications

(12 citation statements)

References 23 publications

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“…BRS Pelota. The stay-green trait may result from a delay in the onset of leaf senescence, from a reduced rate of senescence, or from the inhibition of one of the partial processes involved in chlorophyll breakdown (Thomas & Howarth, 2000;Luquez & Guiamét, 2001). On the theoretical basis, the stay-green trait may cause, different impacts on grain yield as a result of a delay in the onset of leaf senescence or of a lower photosynthetic decline rate, which extends the assimilatory capacity of the canopy, contributing to higher grain formation (Luquez & Guiamét, 2001;Rampino et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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

Falqueto

Cassol

Júnior

et al. 2009

Pesq. agropec. bras.

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-The objective of this work was to evaluate the physiological changes that occur in different leaves during the early and late grain-fi lling 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 fl uorescence, electron transport and oxygen evolution rate were determined in the grain-fi lling stage, from the fi rst to the forth leaf (top to bottom). Pigment content, photochemical effi ciency of photosystem II and electron transport decreased signifi cantly 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-fi lling stage.Index terms: Oryza sativa, oxygen evolution rate, photochemical quenching, photosystem II, photochemicol effi ciency, stay green. Análise fi siológica da senescência foliar de duas cultivares de arroz com diferentes potenciais de produtividadeResumo -O objetivo deste trabalho foi avaliar as mudanças fi siológicas que ocorrem em diferentes folhas durante o início e o fi nal do estádio de enchimento de grãos em dois genótipos de arroz (Oryza sativa subsp. indica cultivar BRS Pelota e O. sativa subsp. japonica cultivar BRS Firmeza) que apresentam diferenças no potencial de produção de grãos. As plantas foram cultivadas em casa de vegetação. Os teores de pigmentos, a fl uorescência da clorofi la e a taxa de liberação de oxigênio foram determinados no estádio de enchimento de grão da primeira à quarta folha (do topo à base). O teor de pigmentos, a efi ciência fotoquímica do fotossistema II e o transporte de elétrons decresceram signifi cativamente de acordo com a posição das folhas na cultivar BRS Pelota. A cultivar BRS Firmeza apresentou maior teor de pigmentos e maior atividade do aparato fotossintético em comparação à 'BRS Pelota' durante o estádio de enchimento de grão.Termos para indexação: Oryza sativa, taxa de evolução de oxigênio, extinção fotoquímica, fotossistema II, efi ciência fotoquímica, senescência retardada.

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Section: Introductionmentioning

confidence: 99%

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

Falqueto

Cassol

Júnior

et al. 2009

Pesq. agropec. bras.

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“…2000). Extending the effective seed filling period requires the maintenance of an active photosynthetic canopy; therefore, the length of the filling period is partly related to the green leaf area duration (Luquez and Guiamet 2001). Selection for high specific leaf weight in soybean may increase apparent photosynthetic rate per unit leaf area, which in turn may improve seed yield (Mian et al.…”

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confidence: 99%

Analysis of quantitative trait loci associated with leaflet types in two recombinant inbred lines of soybean

Kim¹,

Kang²,

Suh³

2005

Plant Breeding

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Leaf area, length and width affect the photosynthetic capability of a plant and so increasing the photosynthetic rate per unit leaf area may improve seed yield in soybean. In this study, simple sequence repeat (SSR) markers were used to identify the genomic regions significantly associated with the quantitative trait locus (QTL) that controls length, width and the length/width ratio of the terminal and lateral leaflet in two segregating F 2:10 recombinant inbred line (RIL) populations, ÔKeounolkongÕ · ÔShinpaldalkongÕ (K/S) and ÔKeounol-kongÕ · ÔIksan10Õ (K/I). In the K/S population, one QTL was identified for terminal leaflet length (TLL), two for lateral leaflet length (LLL), four for terminal leaflet width (TLW), four for lateral leaflet width (LLW), two for terminal leaflet length/width ratio (TLR) and four for lateral leaflet length/width ratio (LLR), with total phenotypic variations of 7.43, 10.9, 26.57, 23.46, 20.25 and 23.31%, respectively. In the K/I population, two QTLs were identified for TLL, two for LLL, three for TLW, and two for LLW, four for TLR and two for LLR with total phenotypic variations of 29. 89, 22.77, 18.5, 12.15, 22.96 and 17.85%, respectively. Only a few QTLs coincided among the leaflet traits and no relationships were observed between the two populations. Many QTLs were associated with leaflet traits but each single QTL made only a minimal contribution. Thus, pyramiding the favourable alleles for leaflet traits in soybean breeding programmes may accelerate vegetative growth and perhaps lead to higher yields by maximizing total photosynthetic performance.

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“…Soybean plants with stay-green symptoms often retain their leaves and all above-ground plant remains green longer than normal. The stay-green trait in soybeans has been shown to be associated with recessive mutations of the determinant genes d1 and d2, which together cause retention of chlorophyll, their binding proteins, and higher levels of rubisco in leaves (Luquez and Guiamet 2000).…”

Section: Stay-greenmentioning

confidence: 99%

Delayed Senescence in Soybean: Terminology, Research Update, and Survey Results from Growers

Harbach

Allen

Bowen

et al. 2016

Plant Health Progress

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The terms used to describe symptoms of delayed senescence in soybean often are used inconsistently or interchangeably and do not adequately distinguish the observed symptoms in the field. Various causes have been proposed to explain the development of delayed senescence symptoms. In this article, we review published reports on delayed senescence symptoms in soybean, summarize current research findings, provide examples of terms related to specific symptoms, and present an overview of the results of a multi-state survey directed to soybean growers to understand their concerns about delayed soybean senescence. Some of these terms, such as green bean syndrome and green stem syndrome, describe symptoms induced by biotic factors, while other terms describe symptoms associated with abiotic factors. Some delayed senescence terms involve the whole plant remaining green while other terms include just the stem and other plant parts such as pods. In the grower survey, 77% reported observing soybean plants or plant parts that remained green after most plants in the field were fully mature with ripe seed. Most respondents attributed these symptoms to changes in breeding and choice of cultivars. At the end of this article, we standardized the terms used to describe delayed senescence in soybean. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

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

Cited by 29 publications

References 23 publications

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

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

Analysis of quantitative trait loci associated with leaflet types in two recombinant inbred lines of soybean

Delayed Senescence in Soybean: Terminology, Research Update, and Survey Results from Growers

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