Arabidopsis as a Model System for Analysis of Leaf Senescence and Inflorescence-Meristem Longevity

Hensel, Linda L.; Bleecker, Anthony B.

doi:10.1007/978-1-4757-9607-0_18

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Plants (Arabidopsis thaliana) were grown as previously described (Hensel and Bleecker, 1992;Hensel et al, 1993). Seeds were surface sterilized with 30% bleach/0.5% Triton X-100 and stratified 2 to 5 days at 4ЊC before planting.…”

Section: Growth Of Plantsmentioning

confidence: 99%

A Defect in β-Oxidation Causes Abnormal Inflorescence Development in Arabidopsis

1999

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The abnormal inflorescence meristem1 ( aim1 ) mutation affects inflorescence and floral development in Arabidopsis. After the transition to reproductive growth, the aim1 inflorescence meristem becomes disorganized, producing abnormal floral meristems and resulting in plants with severely reduced fertility. The derived amino acid sequence of AIM1 shows extensive similarity to the cucumber multifunctional protein involved in ␤ -oxidation of fatty acids, which possesses L -3-hydroxyacyl-CoA hydrolyase, L -3-hydroxyacyl-dehydrogenase, D -3-hydroxyacyl-CoA epimerase, and ⌬ 3 , ⌬ 2 -enoyl-CoA isomerase activities. A defect in ␤ -oxidation has been confirmed by demonstrating the resistance of the aim1 mutant to 2,4-diphenoxybutyric acid, which is converted to the herbicide 2,4-D by the ␤ -oxidation pathway. In addition, the loss of AIM1 alters the fatty acid composition of the mature adult plant.

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Section: Growth Of Plantsmentioning

confidence: 99%

A Defect in β-Oxidation Causes Abnormal Inflorescence Development in Arabidopsis

1999

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“…This is a clear indication that leaf senescence is a developmentally‐programmed process. In Arabidopsis, individual leaves live for an identical life‐span (Hensel and Bleecker 1992; Nooden and Penney 2001), which allows for the use of such a model plant in hunting for genes of age factors. A genetic approach has been actively used to dissect the genes regulating the onset of leaf senescence, and to address how temporally the action of these genes is integrated into the developmental program.…”

Section: Introductionmentioning

confidence: 99%

Regulation of Leaf Senescence and Crop Genetic Improvement^F

Kuai

Jia

et al. 2012

JIPB

142

105

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Leaf senescence can impact crop production by either changing photosynthesis duration, or by modifying the nutrient remobilization efficiency and harvest index. The doubling of the grain yield in major cereals in the last 50 years was primarily achieved through the extension of photosynthesis duration and the increase in crop biomass partitioning, two things that are intrinsically coupled with leaf senescence. In this review, we consider the functionality of a leaf as a function of leaf age, and divide a leaf's life into three phases: the functionality increasing phase at the early growth stage, the full functionality phase, and the senescence and functionality decreasing phase. A genetic framework is proposed to describe gene actions at various checkpoints to regulate leaf development and senescence. Four categories of genes contribute to crop production: those which regulate (I) the speed and transition of early leaf growth, (II) photosynthesis rate, (III) the onset and (IV) the progression of leaf senescence. Current advances in isolating and characterizing senescence regulatory genes are discussed in the leaf aging and crop production context. We argue that the breeding of crops with leaf senescence ideotypes should be an essential part of further crop genetic improvement.Keywords: Leaf Senescence; photosynthesis and photoassimilates; nutrient remobilisation; senescence-associated genes; crop ideotypes.

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Arabidopsis as a Model System for Analysis of Leaf Senescence and Inflorescence-Meristem Longevity

Cited by 2 publications

References 15 publications

A Defect in β-Oxidation Causes Abnormal Inflorescence Development in Arabidopsis

A Defect in β-Oxidation Causes Abnormal Inflorescence Development in Arabidopsis

Regulation of Leaf Senescence and Crop Genetic Improvement^F

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Arabidopsis as a Model System for Analysis of Leaf Senescence and Inflorescence-Meristem Longevity

Cited by 2 publications

References 15 publications

A Defect in β-Oxidation Causes Abnormal Inflorescence Development in Arabidopsis

A Defect in β-Oxidation Causes Abnormal Inflorescence Development in Arabidopsis

Regulation of Leaf Senescence and Crop Genetic ImprovementF

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Regulation of Leaf Senescence and Crop Genetic Improvement^F