Leaf senescence: an overview

Thakur, N. S. A.; Sharma, Vivek; Kishore, Kamal

doi:10.1007/s40502-016-0234-3

Cited by 31 publications

(18 citation statements)

References 119 publications

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“…Leaf senescence is also accompanied by the lower expression of genes related to photosynthesis [ 7 ]. We assayed the expression levels of photosynthesis-associated genes including rbcS , lhcA , lhcB , rbcL , psaA , psbA , petD , ndhA and atpA (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Plant small-molecule hormones such as SA, JA, and ABA play important regulatory roles in most biological processes of plants, including promote or delay of the leaf senescence and up-, down-regulate of defense response genes [ 7 ]. MeJA acts as dominating cellular regulator modulating leaf senescence in JA signaling pathways [ 46 ].…”

Section: Discussionmentioning

confidence: 99%

“…Leaf senescence, as the last stage of leaf development, is an important biological process [ 7 ]. However, premature leaf senescence affects crop yield and biomass production [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, premature leaf senescence affects crop yield and biomass production [ 8 ]. It has been observed that many spl mutants exhibit spontaneous cell death in pre-senescent green leaves under normal growth conditions [ 7 ]. In recent years, many spl mutants have been identified and the causal genes have been cloned.…”

Section: Introductionmentioning

confidence: 99%

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Functional inactivation of OsGCNT induces enhanced disease resistance to Xanthomonas oryzae pv. oryzae in rice

Chen

Shí

et al. 2018

BMC Plant Biol

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BackgroundSpotted-leaf mutants are important to reveal programmed cell death and defense-related pathways in rice. We previously characterized the phenotype performance of a rice spotted-leaf mutant spl21 and narrowed down the causal gene locus spl21(t) to an 87-kb region in chromosome 12 by map-based cloning.ResultWe showed that a single base substitution from A to G at position 836 in the coding sequence of Oryza sativa beta-1,6-N-acetylglucosaminyl transferase (OsGCNT), effectively mutating Tyr to Cys at position 279 in the translated protein sequence, was responsible for the spotted-leaf phenotype as it could be rescued by functional complementation. Compared to the wild type IR64, the spotted-leaf mutant spl21 exhibited loss of chlorophyll, breakdown of chloroplasts, down-regulation of photosynthesis-related genes, and up-regulation of senescence associated genes, which indicated that OsGCNT regulates premature leaf senescence. Moreover, the enhanced resistance to the bacterial leaf blight pathogen Xanthomonas oryzae pv. oryzae, up-regulation of pathogenesis-related genes and increased level of jasmonate which suggested that OsGCNT is a negative regulator of defense response in rice. OsGCNT was expressed constitutively in the leaves, sheaths, stems, roots, and panicles, and OsGCNT-GFP was localized to the Golgi apparatus. High throughput RNA sequencing analysis provided further evidence for the biological effects of loss of OsGCNT function on cell death, premature leaf senescence and enhanced disease resistance in rice. Thus, we demonstrated that the novel OsGCNT regulated rice innate immunity and immunity-associated leaf senescence probably by changing the jasmonate metabolic pathway.ConclusionsThese results reveal that a novel gene Oryza sativa beta-1,6-N-acetylglucosaminyl transferase (OsGCNT) is responsible for the spotted-leaf mutant spl21, and OsGCNT acts as a negative-regulator mediating defense response and immunity-associated premature leaf senescence probably by activating jasmonate signaling pathway.Electronic supplementary materialThe online version of this article (10.1186/s12870-018-1489-9) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Leaf senescence, as the last stage of leaf development, is an important biological process [ 7 ]. However, premature leaf senescence affects crop yield and biomass production [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Functional inactivation of OsGCNT induces enhanced disease resistance to Xanthomonas oryzae pv. oryzae in rice

Chen

Shí

et al. 2018

BMC Plant Biol

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“…Calcium (Ca) is a regulator of physiological and biochemical processes in plants, especially in response to abiotic stresses (Bowler & Fluhr, 2000). This element is known as a second messenger and can delay or promote leaf senescence (Bowler & Chua, 1994), which is a terminal stage of leaf development (Thakur, Sharma, & Kishore, 2016). Ca is also believed to have an influence on the development of heat shock proteins that help the plant tolerate the stress of prolonged heat (Goswami et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effects of different fertilizer treatments on grain yield and yield components of spring wheat

Mikos-Szymańska¹,

Borowik²,

Wyzińska³

et al. 2018

Research for Rural Development

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The present research was carried out to investigate the effects of different fertilizer treatments on grain yield and yield components of spring wheat (Triticum aestivum L.) 'Harenda' cultivar. The five treatments were as follows: control (standard NPK fertilization), standard NPK fertilization plus liquid NPK (10-11-11) fertilizer, standard NPK fertilization plus liquid NPK (10-11-11) fertilizer with microelements, standard NPK fertilization plus calcium micronized suspension fertilizer, and standard NPK fertilization plus Cu, Mn, Zn, Ca micronized suspension fertilizers. The field trials were conducted in 2017 at the Experimental Site of Institute of Soil Science and Plant Cultivation-State Research Institute in Puławy, Poland. Applications of calcium micronized suspension foliar fertilizer and a mixture of Cu, Mn, Zn, Ca micronized suspension fertilizers significantly increased grain yield of spring wheat, respectively by 44.5% and 38.6% in comparison with control (standard NPK fertilization). These fertilizer treatments also enhanced yield components of spring wheat. Moreover, micronized suspension fertilizers (Ca and the mixture of Cu, Mn, Zn, Ca) had a significant effect on ear number and thousand grain weight of spring wheat compared to control and NPK fertilizers. Liquid NPK and micronutrient-enriched NPK fertilizers had a significant effect on thousand grain weight compared to control.

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