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Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Do plants remember drought? Hints towards a drought-memory in grasses
Autor Walter, J.; Nagy, L.; Hein, R.; Rascher, U.; Beierkuhnlein, C.; Willner, E.; Jentsch, A.;
Journal / Serie Environmental and Experimental Botany
Erscheinungsjahr 2011
Department NSF;
Band/Volume 71
Heft 1
Sprache englisch;
Keywords Recurrent drought stress; Climate warming; Memory-effect; Water deficit; Chlorophyll a fluorescence; Phenotypic plasticity
Abstract The frequency of extreme drought events is projected to increase under global climate change, causing damage to plants and crop yield despite potential acclimation. We investigated whether grasses remain acclimated to drought even after a harvest and remember early summer drought exposure over a whole vegetation period. For this, we compared the response of Arrhenatherum elatius plants under a second, late, drought (they were pre-exposed to an early drought before), to plants exposed to a single, only late, extreme drought. Surprisingly, the percentage of living biomass after a late drought increased for plants that were exposed to drought earlier in the growing season compared to single-stressed plants, even after harvest and resprouting after the first drought. Relative leaf water content did not differ between the two treatments. Net photosynthesis was non-significantly reduced by 25% in recurrent drought treatment. Maximum quantum efficiency (Fv/Fm) and maximum fluorescence (Fm) were reduced in plants that were exposed to recurrent drought. These findings indicated improved photoprotection in double-stressed plants. Our results provide first hints towards a "drought memory" over an entire vegetation period, even after harvest and resprouting. However, the advantage of improved photoprotection might also cause reductions in photosynthesis that could have adverse effects on crop yield under more severe or longer droughts.
ID 10876
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=10876
Walter, J., Nagy, L., Hein, R., Rascher, U., Beierkuhnlein, C., Willner, E., Jentsch, A. (2011):
Do plants remember drought? Hints towards a drought-memory in grasses
Environ. Exp. Bot. 71 (1), 34 - 40