Hyperhydricity of Prunus avium shoots cultured on gelrite: a controlled stress response

Plant Physiology and Biochemistry : PPB
T FranckGinette Deby-Dupont

Abstract

Hyperhydricity is a physiological disorder frequently affecting shoots vegetatively propagated in vitro. Hyperhydric shoots are characterised by a translucent aspect due to a chlorophyll deficiency, a not very developed cell wall and a high water content. Hyperhydricity of Prunus avium shoots was expressed in vitro in one multiplication cycle by replacing the gelling agent agar (normal shoots: NS) by gelrite (hyperhydric shoots: HS). P. avium shoots evolving towards the hyperhydric state produced higher amounts of ethylene, polyamines (PAs) and proline, which are substances considered as stress markers. A higher activity of glutathione peroxidase (GPX; EC 1.11.1.9), involved in organic hydroperoxide elimination, suggested an increased production of these compounds in HS. The unchanged free fatty acid composition indicated no HS membrane damages compared to NS. The ploidy level of HS nuclei was not affected, but the bigger size and the lower percentage of nuclei during the S phase suggested a slowing down of the cell cycle. The results argued for a stress response of the HS, but no signs of oxidative damages of lipid membrane and nucleus were observed. The discussion points out paradoxical results in a classical analysis of stre...Continue Reading

References

Apr 29, 1998·Biotechnic & Histochemistry : Official Publication of the Biological Stain Commission·T FranckT Gaspar
May 5, 2001·Plant Science : an International Journal of Experimental Plant Biology·T FranckJ F. Hausman
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Feb 1, 1987·Plant Physiology·H J Walter, J M Geuns

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Citations

Apr 12, 2005·Plant Physiology and Biochemistry : PPB·Shady SaherEnrique Olmos
Oct 15, 2013·Journal of Experimental Botany·Niels van den DriesGeert-Jan M de Klerk
Dec 14, 2011·Plant Physiology and Biochemistry : PPB·Sahar HassannejadMorteza Gholami
Feb 5, 2008·Colloids and Surfaces. B, Biointerfaces·Biao LiBochu Wang
Sep 30, 2017·Conservation Physiology·Valerie C PenceMary F Chaiken

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