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A dramatic increase of chlorophyll (Chl) degradation occurs during senescence of vegetative plant organs and fruit ripening. Although the biochemical pathway of Chl degradation has long been proposed, little is known about its regulatory mechanism. Identification of Chl degradation-disturbed mutants and subsequently isolation of responsible genes would(More)
Degreening, caused by chlorophyll degradation, is the most obvious symptom of senescing leaves. Chlorophyll degradation can be triggered by endogenous and environmental cues, and ethylene is one of the major inducers. ETHYLENE INSENSITIVE3 (EIN3) is a key transcription factor in the ethylene signaling pathway. It was previously reported that EIN3, miR164,(More)
One hundred and seventeen green tall fescue plants and 37 albino plants were regenerated from a glufosinate ammonium resistant callus clone co-transformed with the bar gene and the gusgene, both driven by the rice actin 1 promoter. The gus gene was not detectable in regenerated plants but the presence of the bar gene in these plants was detected by the(More)
ANAC072 positively regulates both age- and dark-induced leaf senescence through activating the transcription of NYE1. Leaf senescence is integral to plant development, which is age-dependent and strictly regulated by internal and environmental signals. Although a number of senescence-related mutants and senescence-associated genes (SAGs) have been(More)
NAC (NAM, ATAF1,2 and CUC2) proteins, which are plant-specific transcription factors, have crucial roles in plant development, abiotic stress responses, defense and leaf senescence. In this study, an NAC gene was isolated and characterized from the bamboo Bambusa emeiensis'Viridiflavus' and tentatively named BeNAC1. Sequence analysis revealed that BeNAC1(More)
Leaf senescence can be triggered and promoted by a large number of developmental and environmental factors. Numerous lines of evidence have suggested an involvement of phytochromes in the regulation of leaf senescence, but the related signaling pathways and physiological mechanisms are poorly understood. In this study, we initially identified(More)
Transgenic exploitation of bacterial degradative genes in plants has been considered a favorable strategy for degrading organic pollutants in the environment. The aromatic ring characteristic of these pollutants is mainly responsible for their recalcitrance to degradation. In this study, a Plesiomonas-derived chlorocatechol 1,2-dioxygenase (TfdC) gene(More)
Chlorophyll (Chl) degradation is an integral process of leaf senescence, and NYE1/SGR1 has been demonstrated as a key regulator of Chl catabolism in diverse plant species. In this study, using yeast one-hybrid screening, we identified three abscisic acid (ABA)-responsive element (ABRE)-binding transcription factors, ABF2 (AREB1), ABF3, and ABF4 (AREB2), as(More)
The non-yellowing gene (NYE1), initially identified from Arabidopsis, is a key regulatory gene responsible for chlorophyll degradation during senescence. Here, FaNYE1, an orthologue of AtNYE1, was further identified from a major type of cool-season turf grass, tall fescue (Festuca arundinacea Schreb.), by RACE-PCR. It consists of 1,441 bp, with an open(More)
Salicylic acid (SA) plays an important role in various aspects of plant development and responses to stresses. To elucidate the sophisticated regulatory mechanism of SA synthesis and signaling, we used a yeast one-hybrid system to screen for regulators of isochorismate synthase 1 (ICS1), a gene encoding the key enzyme in SA biosynthesis in Arabidopsis(More)