The early light-induced protein is also produced during leaf senescence of Nicotiana tabacum

Binyamin, Liat; Falah, M.; Portnoy, Victoria; Soudry, Esther; Gepstein, Shimon

doi:10.1007/s004250000423

Cited by 44 publications

(27 citation statements)

References 40 publications

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“…One example is the ELIP, which is known to accumulate in thylakoids during not only early stages of light-induced greening but also stress (Binyamin et al, 2001). Although ELIP has not as yet been found in our Arabidopsis senescing subtraction library, this gene was shown to be preferentially expressed in senescing leaves of tobacco, a monocarpic plant (Binyamin et al, 2001). Thus, ELIP may prove to play an additional and important role in the senescence program of both perennial trees and monocarpic plants.…”

Section: Senescence-enhanced Gene Expression In Monocarpic Plants As mentioning

confidence: 92%

“…In general, stress-related proteins are preferentially expressed and abundant in Arabidopsis and other monocarpic senescing leaf (Quirino et al, 1999) and are similarly highly expressed in the autumn leaf of aspen (Bhalerao et al, 2003). One example is the ELIP, which is known to accumulate in thylakoids during not only early stages of light-induced greening but also stress (Binyamin et al, 2001). Although ELIP has not as yet been found in our Arabidopsis senescing subtraction library, this gene was shown to be preferentially expressed in senescing leaves of tobacco, a monocarpic plant (Binyamin et al, 2001).…”

Section: Senescence-enhanced Gene Expression In Monocarpic Plants As mentioning

confidence: 99%

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Large‐scale identification of leaf senescence‐associated genes

et al. 2003

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SummaryLeaf senescence is a form of programmed cell death, and is believed to involve preferential expression of a speci®c set of`senescence-associated genes' (SAGs). To decipher the molecular mechanisms and the predicted complex network of regulatory pathways involved in the senescence program, we have carried out a large-scale gene identi®cation study in a reference plant, Arabidopsis thaliana. Using suppression subtractive hybridization, we isolated approximately 800 cDNA clones representing SAGs expressed in senescing leaves. Differential expression was con®rmed by Northern blot analysis for 130 non-redundant genes. Over 70 of the identi®ed genes have not previously been shown to participate in the senescence process. SAGencoded proteins are likely to participate in macromolecule degradation, detoxi®cation of oxidative metabolites, induction of defense mechanisms, and signaling and regulatory events. Temporal expression pro®les of selected genes displayed several distinct patterns, from expression at a very early stage, to the terminal phase of the senescence syndrome. Expression of some of the novel SAGs, in response to age, leaf detachment, darkness, and ethylene and cytokinin treatment was compared. The large repertoire of SAGs identi®ed here provides global insights about regulatory, biochemical and cellular events occurring during leaf senescence.

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Section: Senescence-enhanced Gene Expression In Monocarpic Plants As mentioning

confidence: 92%

Section: Senescence-enhanced Gene Expression In Monocarpic Plants As mentioning

confidence: 99%

Large‐scale identification of leaf senescence‐associated genes

et al. 2003

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“…Also, significant amounts of Elip transcripts, but not proteins, accumulated in senescing leaves of some pea cultivars under low light conditions and the exposure to light stress resulted in a massive accumulation of Elip transcripts and proteins (Norén et al, 2003). Furthermore, the accumulation of Elip transcripts and proteins was reported also in artificially induced senescence of detached tobacco (Nicotiana tabacum) leaves kept at low light intensities (Binyamin et al, 2001). In contrast to these reports no Elip1 or Elip2 transcripts or proteins were detected in senescent yellow leaves of Arabidopsis under low light conditions.…”

Section: Differential Expression Of Elip1 and Elip2 In Light Stress-pmentioning

confidence: 97%

Differential Expression and Localization of Early Light-Induced Proteins in Arabidopsis

et al. 2006

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The early light-induced proteins (Elips) in higher plants are nuclear-encoded, light stress-induced proteins located in thylakoid membranes and related to light-harvesting chlorophyll (LHC) a/b-binding proteins. A photoprotective function was proposed for Elips. Here we showed that after 2 h exposure of Arabidopsis (Arabidopsis thaliana) leaves to light stress Elip1 and Elip2 coisolate equally with monomeric (mLhcb) and trimeric (tLhcb) populations of the major LHC from photosystem II (PSII) as based on the Elip:Lhcb protein ratio. A longer exposure to light stress resulted in increased amounts of Elips in tLhcb as compared to mLhcb, due to a reduction of tLhcb amounts. We demonstrated further that the expression of Elip1 and Elip2 transcripts was differentially regulated in green leaves exposed to light stress. The accumulation of Elip1 transcripts and proteins increased almost linearly with increasing light intensities and correlated with the degree of photoinactivation and photodamage of PSII reaction centers. A stepwise accumulation of Elip2 was induced when 40% of PSII reaction centers became photodamaged. The differential expression of Elip1 and Elip2 occurred also in light stress-preadapted or senescent leaves exposed to light stress but there was a lack of correlation between transcript and protein accumulation. Also in this system the accumulation of Elip1 but not Elip2 correlated with the degree of PSII photodamage. Based on pigment analysis, measurements of PSII activity, and assays of the oxidation status of proteins we propose that the discrepancy between amounts of Elip transcripts and proteins in light stress-preadapted or senescent leaves is related to a presence of photoprotective anthocyanins or to lower chlorophyll availability, respectively.

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“…For example, numerous SAGs are influenced by diverse abiotic and biotic stresses (Weaver et al, 1998;Quirino et al, 1999). In addition, genes regulating stress responses also affect leaf aging (Binyamin et al, 2001;Yoon et al, 2008). In this respect, transcriptional control of leaf senescence is believed to be an important mechanism under environmental stress conditions.…”

Section: Introductionmentioning

confidence: 99%

TheArabidopsisNAC Transcription Factor VNI2 Integrates Abscisic Acid Signals into Leaf Senescence via theCOR/RDGenes

et al. 2011

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Leaf aging is a highly regulated developmental process, which is also influenced profoundly by diverse environmental conditions. Accumulating evidence in recent years supports that plant responsiveness to abiotic stress is intimately related with leaf longevity. However, molecular mechanisms underlying the signaling crosstalks and regulatory schemes are yet unknown. In this work, we demonstrate that an abscisic acid (ABA)-responsive NAC transcription factor VND-INTERACTING2 (VNI2) integrates ABA-mediated abiotic stress signals into leaf aging by regulating a subset of COLD-REGULATED (COR) and RESPONSIVE TO DEHYDRATION (RD) genes. The VNI2 gene was induced by high salinity in an ABA-dependent manner. In addition, spatial and temporal expression patterns of the VNI2 gene are correlated with leaf aging and senescence. Accordingly, leaf aging was delayed in transgenic plants overexpressing the VNI2 gene but significantly accelerated in a VNI2-deficient mutant. The VNI2 transcription factor regulates the COR and RD genes by binding directly to their promoters. Notably, transgenic plants overexpressing the COR or RD genes exhibited prolonged leaf longevity. These observations indicate that the VNI2 transcription factor serves as a molecular link that integrates plant responses to environmental stresses into modulation of leaf longevity.

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The early light-induced protein is also produced during leaf senescence of Nicotiana tabacum

Cited by 44 publications

References 40 publications

Large‐scale identification of leaf senescence‐associated genes

Large‐scale identification of leaf senescence‐associated genes

Differential Expression and Localization of Early Light-Induced Proteins in Arabidopsis

TheArabidopsisNAC Transcription Factor VNI2 Integrates Abscisic Acid Signals into Leaf Senescence via theCOR/RDGenes

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