Sunlight-induced anthocyanin pigmentation in maize vegetative tissues

Singh, Anju; Selvi, M. Tamil; Sharma, Rameshwar

doi:10.1093/jxb/50.339.1619

Cited by 37 publications

(12 citation statements)

References 24 publications

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“…They have been shown to protect sensitive tissues by acting as a UV screen (Singh et al 1999). High temperature increases anthocyanin concentration in certain plant species (Oren-Shamir and Nissim-Levi 1999;Sachray et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Physiological implications of metabolite biosynthesis for net assimilation and heat-stress tolerance of sugarcane ( Saccharum officinarum) sprouts

2006

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Global increase in ambient temperature is a critical factor for plant growth. In order to study the changes in growth over short intervals, various primary and secondary metabolites, and their relationships with thermotolerance, 1-month-old sugarcane (Saccharum officinarum) sprouts were grown under control conditions (28 degrees C) or under heat-stress conditions (40 degrees C), and measurements were made at six 12-h intervals. Heat stress greatly reduced dry matter and leaf area of sprouts initially but only nominally later on. Changes in the rates of relative growth and net assimilation were greater than relative leaf expansion, indicating an adverse effect of heat on assimilation of nutrients and CO(2) in producing dry matter. Although reduction in leaf water potential was an immediate response to heat, this effect was offset by early synthesis of free proline, glycinebetaine and soluble sugars (primary metabolites). Among secondary metabolites, anthocyanin synthesis was similar to primary metabolites; carotenoids and soluble phenolics accumulated later while chlorophyll remained unaffected. Relationships of growth attributes and metabolite levels, not seen in the controls, were evident under heat stress. In summary, observed changes in metabolite levels were spread over time and space and were crucial in improving net assimilation and heat tolerance of sugarcane.

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Section: Discussionmentioning

confidence: 99%

Physiological implications of metabolite biosynthesis for net assimilation and heat-stress tolerance of sugarcane ( Saccharum officinarum) sprouts

2006

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“…Highly similar (blastp: E=0.0) to maize phenylalanine ammonia-lyase that is up-regulated by cold (Christie et al 2004) and light (Singh et al 1999)…”

Section: Gelc-ms Analysis Of the Oh43 Ploidy Seriesmentioning

confidence: 96%

Phenotypic and gene expression analyses of a ploidy series of maize inbred Oh43

et al. 2010

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Polyploidization has repeatedly occurred during plant evolution. Although autopolyploidy is the best model to characterize the polyploidization effects in a highly controlled manner, there are limited studies on autopolyploids compared to allopolyploids. To improve our understanding of autopolyploidy effects in maize, we developed an inbred Oh43 ploidy series consisting of the diploid (2X), tetraploid (4X) and hexaploid (6X) lines and compared their phenotypes and gene expression in the mature adult leaf tissue. Our phenotypic study showed that plants of higher ploidy exhibit increased cell size but slower growth rate, later flowering, fewer tassel branches, reduced stature and fertility. Two-dimensional difference gel electrophoresis (2D DIGE) and gel electrophoresis followed by liquid chromatography and mass spectrometry (GeLC-MS) assays of the leaf proteomes revealed ~40 and 26% quantitative differentially expressed (DE) proteins, respectively, at the per genome level. A small number of qualitative DE proteins were also identified in the GeLC-MS assay. The majority of the quantitative DE proteins found in the 2D DIGE assay were present in either the 4X versus 6X or the 2X versus 6X comparison but not the 2X versus 4X comparison. Aneuploidy in some 6X plants might contribute to the more extensive changes of gene expression per genome in the 6X. Most changes of the protein expression per genome are less than twofold. Less than 5% of the DE genes exhibit a positive or negative continuous correlation through the ploidy series between their protein expression per genome, and the genome copy number. Hence, in the Oh43 ploidy series, expression for most proteins in a cell increases linearly with ploidy.

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“…They show accumulation under water and salt stresses as well (Dixon and Paiva, 1995;Ali and Abbas, 2003). Flavonoids are known to protect the sensitive tissues against the damaging effects of UV-radiation (Singh et al, 1999), but their roles have also been envisaged in salinity, as they are ion chelators (Taiz and Zeiger, 2002;Winkel-Shirley, 2002). They are metabolically active when present in glycosylated form (Frangne et al, 2002).…”

Section: Article In Pressmentioning

confidence: 99%