Expression of PsGRP1, a novel glycine rich protein gene of Pisum sativum, is induced in developing fruit and seed and by ABA in pistil and root

Abstract

A novel glycine-rich protein gene, PsGRP1, has been identified in Pisum sativum L. Accumulation of PsGRP1 transcripts was observed in reproductive organs and vegetative tissues. They were localized in endocarp sclerenchyma during fruit development in cells that will lignify. PsGRP1 expression was also detected in senescent pistils and developing seeds and induced by ABA treatment in presenescent pistils. A raise in the expression was also observed in roots after treatment with ABA or mannitol but not under cold stress. A mannitol treatment induced a rise in ABA levels and fluridone treatment counteracted the mannitol induction of PsGRP1 expression. The results suggest a possible role for PsGRP1 in differentiation of the endocarp sclerenchyma and during seed development, pistil senescence and osmotic stress under ABA control.

Overexpression of AtGRDP2, a novel glycine-rich domain protein, accelerates plant growth and improves stress tolerance

“…In particular, PtGRP1 gene expression levels were associated to expansive growth, and the PtGRP1 protein was localized in the cell wall/membrane interphase (Condit, 1993 ). In the past years, it has been documented that some plant hormones that regulate many aspects of plant growth, development and stress responses modulate the expression of GRP genes (Reddy and Poovaiah, 1987 ; Urbez et al, 2006 ; Long et al, 2013 ).…”

The Glycine-Rich Domain Protein GRDP2 Regulates Ovule Development via the Auxin Pathway in Arabidopsis

“…For example, GRPs accumulate significantly in auxin deficient strawberry fruits (Reddy and Poovaiah, 1987). In pea, GRP1 gets enriched in fruits and seeds; however, ABA induction results in its increase in the pistil and root (Urbez et al, 2006). Overexpression of alfalfa GRP leads to salt and ABA sensitivity in Arabidopsis thaliana (Long et al, 2013).…”

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“…For example, GRPs accumulate significantly in auxin deficient strawberry fruits (Reddy and Poovaiah, 1987). In pea, GRP1 gets enriched in fruits and seeds; however, ABA induction results in its increase in the pistil and root (Urbez et al, 2006). Overexpression of alfalfa GRP leads to salt and ABA sensitivity in Arabidopsis thaliana (Long et al, 2013).…”