Identification of an AtCRN1-like chloroplast protein BeCRN1 and its distinctive role in chlorophyll breakdown during leaf senescence in bamboo (Bambusa emeiensis ‘Viridiflavus’)

2013 ◽  
Vol 114 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Qiang Wei ◽  
Huiming Cao ◽  
Zhongru Li ◽  
Benke Kuai ◽  
Yulong Ding
Keyword(s):  
Leaf Senescence ◽  
Chloroplast Protein ◽  
Chlorophyll Breakdown ◽  
Bambusa Emeiensis ◽  
Distinctive Role

scholarly journals Low Light/Darkness as Stressors of Multifactor-Induced Senescence in Rice Plants

2021 ◽  
Vol 22 (8) ◽  
pp. 3936
Author(s):  
Ahmed G. Gad ◽  
Habiba ◽  
Xiangzi Zheng ◽  
Ying Miao
Keyword(s):  
Leaf Senescence ◽  
Crop Yields ◽  
Crop Improvement ◽  
Light Response ◽  
Development Stage ◽  
Regulatory Mechanisms ◽  
Economic Losses ◽  
Low Light ◽  
Chlorophyll Breakdown ◽  
Premature Leaf Senescence

Leaf senescence, as an integral part of the final development stage for plants, primarily remobilizes nutrients from the sources to the sinks in response to different stressors. The premature senescence of leaves is a critical challenge that causes significant economic losses in terms of crop yields. Although low light causes losses of up to 50% and affects rice yield and quality, its regulatory mechanisms remain poorly elucidated. Darkness-mediated premature leaf senescence is a well-studied stressor. It initiates the expression of senescence-associated genes (SAGs), which have been implicated in chlorophyll breakdown and degradation. The molecular and biochemical regulatory mechanisms of premature leaf senescence show significant levels of redundant biomass in complex pathways. Thus, clarifying the regulatory mechanisms of low-light/dark-induced senescence may be conducive to developing strategies for rice crop improvement. This review describes the recent molecular regulatory mechanisms associated with low-light response and dark-induced senescence (DIS), and their effects on plastid signaling and photosynthesis-mediated processes, chloroplast and protein degradation, as well as hormonal and transcriptional regulation in rice.

scholarly journals Identification of a Novel Chloroplast Protein AtNYE1 Regulating Chlorophyll Degradation during Leaf Senescence in Arabidopsis

2007 ◽  
Vol 144 (3) ◽  
pp. 1429-1441 ◽  
Author(s):  
Guodong Ren ◽  
Kun An ◽  
Yang Liao ◽  
Xiao Zhou ◽  
Yajun Cao ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Chlorophyll Degradation ◽  
Chloroplast Protein

The Mechanism of Leaf Senescence in Tobacco

2012 ◽  
Vol 524-527 ◽  
pp. 2211-2217
Author(s):  
Feng Jia ◽  
Li Zhang ◽  
Gui Ling Li ◽  
Lei Zeng
Keyword(s):  
Abscisic Acid ◽  
Nucleic Acids ◽  
Protein Degradation ◽  
Leaf Senescence ◽  
Plant Development ◽  
Final Stage ◽  
Vital Role ◽  
Endogenous Hormones ◽  
Chlorophyll Breakdown

Leaf senescence is the final stage of plant development. Senescence also is a complex and highly regulated process that involves a decline in photosynthesis, dismantling of chloroplasts, and degradation of macromolecules such as proteins, nucleic acids, and lipids. This review mainly introduces the process of leaf senescence through leaf senescence pathway in three parts: initiation, degeneration, and terminal. To sort out the tobacco-related genes change that show increased or decreased expression during the leaf senescence. Moreover, endogenous hormones, such as cytokinins, ethylene, and abscisic acid, play the vital role during the leaf senescence. At the same time, many protein degradation, chlorophyll breakdown, and nigtrogen remobilization in the regulation of senescence are discussed.

scholarly journals Pheophytin Pheophorbide Hydrolase (Pheophytinase) Is Involved in Chlorophyll Breakdown during Leaf Senescence in Arabidopsis

2009 ◽  
Vol 21 (3) ◽  
pp. 767-785 ◽  
Author(s):  
Silvia Schelbert ◽  
Sylvain Aubry ◽  
Bo Burla ◽  
Birgit Agne ◽  
Felix Kessler ◽  
...  
Keyword(s):  
Leaf Senescence ◽  
Chlorophyll Breakdown

scholarly journals Water-use efficiency declines during autumn leaf senescence in three deciduous tree species

2013 ◽  
Vol 4 (1) ◽  
pp. 7
Author(s):  
Adriana Sanchez ◽  
Nicole M. Hughes ◽  
William K. Smith
Keyword(s):  
Leaf Senescence ◽  
Tree Species ◽  
Acer Saccharum ◽  
Frost Damage ◽  
Deciduous Tree ◽  
Chlorophyll Breakdown ◽  
Adaptive Value ◽  
Autumn Leaf ◽  
Use Efficiency ◽  
And Storage

During fall leaf senescence in deciduous species, photosynthesis nears completion due to chlorophyll breakdown and re-assimilation. However, several other processes such as leaf nutrient uptake, re-translocation, and storage, or tissue dehydration to avoid frost damage, may be important and dependent upon stomatal opening. We report here on measured changes in photosynthesis (<em>A</em>), leaf conductance to water vapor (<em>g</em>), and WUE (estimated by <em>A/g</em>) in three deciduous tree species (<em>Acer saccharum, Cornus florida, </em>and<em> Ginkgo biloba</em>) during the weeks of leaf senescence preceding abscission. Substantial decreases in <em>A </em>of 60 up to 80% were not matched quantitatively by similar declines in <em>g</em> (40 to 70%), resulting in corresponding decreases in WUE (estimated by <em>A/g</em>) from near 50% to over 300% among the three species. This shift to a lower WUE may reflect adaptive value in maintaining a higher <em>g</em> relative to <em>A</em> during the fall leaf senescence period.

Altered protein synthesis during in situ oat leaf senescence

1990 ◽  
Vol 80 (4) ◽  
pp. 619-623 ◽  
Author(s):  
Louise Lalonde ◽  
Rajinder S. Dhindsa
Keyword(s):  
Protein Synthesis ◽  
Leaf Senescence ◽  
Altered Protein
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