Photosynthesis performance of non-rolling and flag leaf rolling wheat genotypes during temperature stress

Autor:	H. K. Lichtenthaler, G. Sariyeva, S. Kenjebaeva
Rok vydání:	2009
Předmět:	Biological pigment Stomatal conductance Photoinhibition fungi food and beverages Plant Science Photosynthetic pigment Biology Photosynthesis Acclimatization chemistry.chemical_compound chemistry Agronomy Chlorophyll sense organs Water-use efficiency Ecology Evolution Behavior and Systematics
Zdroj:	Acta Botanica Hungarica. 51:185-194
ISSN:	1588-2578 0236-6495
Popis:	The objective of this study is to determine the potential of photosynthesis for the detection of heat stress in three wheat genotypes ‘Grekum 476’, ‘Otan’ and ‘Alba’, which are known to differ in their leaf rolling ability. The results of measurements of gas-exchange, stomatal conductance and pigment determination indicate that the use of a temperature of 40 °C allows to distinguish the non-rolling and leaf rolling wheat genotypes in their photosynthetic responses to heat stress.High temperature acclimation by the leaf rolling wheat genotypes caused marked changes in the pigment composition and function of the photosynthetic apparatus. Thus, stomatal regulation (changes in gH 2 O values), the changes in WUE and modification of the photosynthetic pigment apparatus as well as the up-rolling of the flag leaf at a higher irradiance are essential factors that contribute to avoid heat and drought conditions as well as photoinhibition of the photosynthetic apparatus in major parts of the leaf. The two most leaf ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cfd6ff259b3e18ad024024fd50be65a8 https://doi.org/10.1556/abot.51.2009.1-2.18 Zobrazit plný text záznamu