Cultivar variation in cotton photosynthetic performance under different temperature regimes.
| Autor: | Pettigrew, W. T. |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
chlorofyl
bavlna teplota chlorophyll cotton temperature články journal articles fluorescence chlorofylu kultivary abiotický stres mezibuněčná koncentrace CO₂ list výměna plynu termotolerance efektivita využívání vody chlorophyll fluorescence cultivars abiotic stress intercellular CO₂ concentration leaf gas exchange maximum quantum yield thermotolerance water-use efficiency |
| Druh dokumentu: | Non-fiction |
| ISSN: | 0300-3604 |
| Abstrakt: | Abstract: Cotton (Gossypium hirsutum L.) yields are impacted by overall photosynthetic production. Factors that influence crop photosynthesis are the plants genetic makeup and the environmental conditions. This study investigated cultivar variation in photosynthesis in the field conditions under both ambient and higher temperature. Six diverse cotton cultivars were grown in the field at Stoneville, MS under both an ambient and a high temperature regime during the 2006-2008 growing seasons. Mid-season leaf net photosynthetic rates (PN) and dark-adapted chlorophyll fluorescence variable to maximal ratios (Fv/Fm) were determined on two leaves per plot. Temperature regimes did not have a significant effect on either PN or Fv/Fm. In 2006, however, there was a significant cultivar × temperature interaction for PN caused by PeeDee 3 having a lower PN under the high temperature regime. Other cultivars' PN were not affected by temperature. FM 800BR cultivar consistently had a higher PN across the years of the study. Despite demonstrating a higher leaf Fv/Fm, ST 5599BR exhibited a lower PN than the other cultivars. Although genetic variability was detected in photosynthesis and heat tolerance, the differences found were probably too small and inconsistent to be useful for a breeding program. |
| Databáze: | Katalog Knihovny AV ČR |
| Externí odkaz: |
|
Full text from SpringerLink