Leaf Senescence in a Stay-Green Rice Variety, SNU-SG1 and a Mutant, sgr

2008 ◽  
pp. 1515-1518
Author(s):  
Min-Hyuk Oh ◽  
Tae-Shik Park ◽  
Woon-Ho Yang ◽  
Kang-Su Kwak ◽  
Jin-Chul Shin ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Rice Variety ◽  
Stay Green

Effects of Exogenous ABA and 6-BA on Flag Leaf Senescence in Different Types of Stay-Green Wheat and Relevant Physiological Mechanisms

2013 ◽  
Vol 39 (6) ◽  
pp. 1096 ◽  
Author(s):  
Dong-Qing YANG ◽  
Zhen-Lin WANG ◽  
Yan-Ping YIN ◽  
Ying-Li NI ◽  
Wei-Bing YANG ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Flag Leaf ◽  
Physiological Mechanisms ◽  
Stay Green ◽  
Exogenous Aba ◽  
Different Types

Identification of Arabidopsis stay-green mutants with a functional ethylene-response pathway

2010 ◽  
Vol 14 ◽  
pp. 119-129
Author(s):  
R. Shirzadian-Khorramabad ◽  
H.C. Jing ◽  
J. Hille ◽  
P.P. Dijkwel
Keyword(s):  
Shelf Life ◽  
Leaf Senescence ◽  
Plant Hormone ◽  
Floral Induction ◽  
Growth Conditions ◽  
Pleiotropic Effects ◽  
Wild Type ◽  
Stay Green ◽  
Ethylene Response ◽  
Determinant Factor

Natural or harvest-induced senescence is a major determinant factor causing crop losses. The plant hormone ethylene is a strong inducer of senescence and decreasing the ethylene response can reduce senescence, albeit often with undesirable pleiotropic effects. We took advantage of ethylene-induced leaf senescence as a tool to screen for late senescence Arabidopsis mutants that still have a functional ethylenesignalling pathway. Sixteen Arabidopsis onset of leaf death (old) mutants were selected that stayed green after treatment with ethylene. While all the mutants responded to ethylene in a triple response assay, ten mutants responded to the treatment in the same way as the wild type. These ten mutants showed limited pleiotropic effects when grown under standard growth conditions but nine mutants flowered slightly later than the wild type. Genetic characterisation of a subset of the mutants identified several independent loci controlling the leaf senescence process. The approach resulted in the isolation of several stay-green mutants with a functional ethylene response pathway. The late senescence mutants show extended leaf longevity and further research may advance the field of pre- or post-harvest senescence technology. The results, moreover, suggest that there is a correlation between senescence and floral induction. Keywords: Senescence, Arabidopsis, ethylene, mutant, shelf life

scholarly journals Genetics and Genomic basis of Stay-green Trait

2021 ◽  
Vol 14 (2) ◽  
Author(s):  
Harshavardan J Hilli
Keyword(s):  
Transcription Factors ◽  
Leaf Senescence ◽  
Genetic Improvement ◽  
Physiological Role ◽  
Dimensional Approach ◽  
Stay Green ◽  
Chlorophyll Pigment ◽  
Yield Gain ◽  
Genomic Basis ◽  
Potential Use

Staygreen is one such trait in which genotypes possessing this trait maintain more photo synthetically active leaves (& less senescent) than genotypes not possessing this trait. Delay of leaf senescence also known as stay-green character, has been identified as an important component in the genetic improvement of several crops to promote stress tolerance and yield gain. Although the stay-green phenotype is superficially similar in all species and genotypes, the genetic and physiological routes the traits are diverse. Photosynthetically active leaves for longer period depends on the concentration of chlorophyll pigment absorbing sunlight for photosynthesis. An multi dimensional approach for studying the senescence pathway rather than studying only the physiological role made a significant role in improvement. Hence new approaches like genomics, proteomics and metabolomics studies are necessary to understand the various transcription factors involved in regulating the leaf senescence process. Therefore, this review has aimed to bring light to major aspects of the stay-green character, showing its potential use in plant breeding.

scholarly journals What stay‐green mutants tell us about nitrogen remobilization in leaf senescence

2002 ◽  
Vol 53 (370) ◽  
pp. 801-808 ◽  
Author(s):  
Howard Thomas ◽  
Helen Ougham ◽  
Peter Canter ◽  
Iain Donnison
Keyword(s):  
Leaf Senescence ◽  
Nitrogen Remobilization ◽  
Stay Green

Stay-green plants: what do they tell us about the molecular mechanism of leaf senescence

2013 ◽  
Vol 117 (1-3) ◽  
pp. 221-234 ◽  
Author(s):  
Makoto Kusaba ◽  
Ayumi Tanaka ◽  
Ryouichi Tanaka
Keyword(s):  
Molecular Mechanism ◽  
Leaf Senescence ◽  
Stay Green ◽  
Green Plants

scholarly journals Large scale genome-wide association study reveals that drought induced lodging in grain sorghum is associated with plant height and traits linked to carbon remobilisation

2019 ◽  
Author(s):  
Xuemin Wang ◽  
Emma Mace ◽  
Yongfu Tao ◽  
Alan Cruickshank ◽  
Colleen Hunt ◽  
...  
Keyword(s):  
Association Study ◽  
Plant Height ◽  
Leaf Senescence ◽  
Genome Wide Association Study ◽  
Grain Sorghum ◽  
Genome Wide Association ◽  
Lodging Resistance ◽  
Stay Green ◽  
Genome Wide ◽  
Selection For

AbstractSorghum is generally grown in water limited conditions and often lodges under post-anthesis drought, which reduces yield and quality. Due to its complexity, our understanding on the genetic control of lodging is very limited. We dissected the genetic architecture of lodging in grain sorghum through genome-wide association study (GWAS) on 2308 unique hybrids grown in 17 Australian sorghum trials over 3 years. The GWAS detected 213 QTL, the majority of which showed a significant association with leaf senescence and plant height (72% and 71% respectively). Only 16 lodging QTL were not associated with either leaf senescence or plant height. The high incidence of multi-trait association for the lodging QTL indicates that lodging in grain sorghum is mainly associated with plant height and traits linked to carbohydrate remobilisation. This result supported the selection for stay-green (delayed leaf senescence) to reduce lodging susceptibility, rather than selection for short stature and lodging resistance per se, which likely reduces yield. Additionally, our data suggested a protective effect of stay-green on weakening the association between lodging susceptibility and plant height. Our study also showed that lodging resistance might be improved by selection for stem composition but was unlikely to be improved by selection for classical resistance to stalk rots.Key messageWe detected 213 lodging QTL and demonstrated that drought induced stem lodging in grain sorghum is substantially associated with stay-green and plant height, suggesting a critical role of carbon remobilisation.

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