Meristem aging is not responsible for age-related changes in growth and abscisic acid levels in the Mediterranean shrub, Cistus clusii

Plant Biology
M Oñate, Sergi Munné-Bosch

Abstract

To obtain new insights into the mechanisms underlying aging in perennials, we measured abscisic acid levels, growth and other stress indicators in leaves of Cistus clusii Dunal plants of different ages grown under Mediterranean field conditions. Recently emerged leaves from 9-year-old plants were compared to those of 1-year-old plants (obtained from cuttings from 9-year-old plants) to evaluate the effects of meristem aging on plant aging. Rooting and successful establishment of the cuttings allowed us to compare the physiology of plants with old meristems, but of different size. Plants obtained from cuttings were rejuvenated, with new leaves displaying a higher leaf area and chlorophyll content, but smaller leaf mass per unit area ratios and endogenous abscisic acid levels than those of 9-year-old plants. A comparative study in 1-, 4- and 9-year-old plants revealed that abscisic acid levels increase during the early stages of plant life (with increases of 90% between 1- and 4-year-old plants), but then remain constant at advanced developmental stages (between 4- and 9-year-old plants). Although leaf biomass was 53% smaller in 9-year-old compared to 4-year-old plants, the dry matter produced per shoot apical meristem was equival...Continue Reading

References

Jul 26, 2000·Trends in Plant Science·B J Bond
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Jun 5, 2002·The Plant Cell·Ruth R FinkelsteinChristopher D Rock
Sep 16, 2003·Current Opinion in Plant Biology·Axel HimmelbachErwin Grill
Nov 7, 2003·Science of Aging Knowledge Environment : SAGE KE·Kendall Morgan
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Sep 1, 1990·Photosynthesis Research·O van Kooten, J F Snel

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Citations

Sep 30, 2014·The New Phytologist·Melanie Morales, Sergi Munné-Bosch
Sep 8, 2010·Journal of Plant Physiology·Iker HernándezSergi Munné-Bosch
Mar 11, 2008·Trends in Plant Science·Sergi Munné-Bosch
Sep 20, 2008·Plant Biology·K Krupinska, K Humbeck

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