Název: High night temperature-induced accelerated maturation of rice panicles can be detected by chlorophyll fluorescence
Autoři: Šebela, David ; Quiňones, C. ; Olejníčková, Julie ; Jagadish, K. S. V.
Typ dokumentu: Příspěvky z konference
Konference/Akce: Global Change: A Complex Challenge /4th/, Brno (CZ), 2015-03-23 / 2015-03-24
Rok: 2015
Jazyk: eng
Abstrakt: Rice panicle maturation is considered to be highly sensitive to environmental conditions. Since one of the factors accompanying global climate change is increases in minimum night temperatures more pronounced than those in maximum day temperatures, the effect of high night temperature (HNT) on rice panicle maturation was investigated. Two rice genotypes with contrasting HNT responses, N22 (highly tolerant) and Gharib (susceptible), were exposed to control temperatures (ca 23°C) and HNTs (ca 29°C) from flowering until maturity. Loss of photosynthetic activity and/or pigments during rice panicle maturation were evaluated temporally by measuring (i) effective quantum yield of photosystem II efficiency (ΦII), and (ii) steady-state chlorophyll fluorescence level (FS). To prove the accuracy of the new approach presented in this study, several vegetative indices were calculated from reflectance measurements and correlated with fluorescence parameters. It has been observed that ΦII tracks the accelerated maturation of rice panicles exposed to HNT better than does FS. Employing a newly identified chlorophyll fluorescence-based parameter could potentially enable larger genetic diversity scans and identification of novel genotypes with longer panicle maturation periods so as to increase rice yields directly under field conditions.
Klíčová slova: chlorophyll fluorescence; temperature
Číslo projektu: EE2.3.20.0246, LO1415 (CEP)
Poskytovatel projektu: GA MŠk, GA MŠk
Zdrojový dokument: Global Change: A Complex Challenge : Conference Proceedings, ISBN 978-80-87902-10-3

Instituce: Ústav výzkumu globální změny AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0256898

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-202706


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav výzkumu globální změny
Konferenční materiály > Příspěvky z konference