Photosynthetic and physiological responses of foxtail millet (Setaria italica L.) to low-light stress during grain-filling stage Authors Aut.

Autor:	Yuan, X. Y.
Další autoři:	Zhang, L. G. Huang, L. Qi, X. Wen, Y. Y. Dong, S. Q. Song, X. E. Wang, H. F. Guo, P. Y.
Jazyk:	angličtina
Předmět:	články journal articles agronomické charakteristiky obsah chlorofylu fluorescence chlorofylu sklizeň bér italský agronomic characteristics chlorophyll content chlorophyll fluorescence photosynthetic physiology yield foxtail millet Setaria italica low-light stress
Druh dokumentu:	Non-fiction
ISSN:	0300-3604
Abstrakt:	Abstract: Two foxtail millet (Setaria italica L.) varieties were subjected to different shading intensity treatments during a grain-filling stage in a field experiment in order to clarify physiological mechanisms of low-light effects on the yield. Our results showed that the grain fresh mass per panicle, yield, photosynthetic pigment contents, net photosynthetic rate, stomatal conductance, effective quantum yield of PSII photochemistry, and electron transport rate decreased with the increase of shading intensity, whereas the intercellular CO₂ concentration increased in both varieties. In addition, shading changed a double-peak diurnal variation of photosynthesis to a one-peak curve. In conclusion, the lower yield of foxtail millet was caused mainly by a reduction of grain mass assimilated, a decline in chlorophyll content, and the low photosynthetic rate due to low light during the grain-filling stage. Reduced light energy absorption and conversion, restricted electron transfer, and reduced stomatal conductance might cause the decrease in photosynthesis.
Databáze:	Katalog Knihovny AV ČR
Externí odkaz:	Plný text Full text from SpringerLink