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Publication
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| Title of Article |
Seasonal variation in diurnal photosynthesis and
chlorophyll fluorescence of four genotypes of
cassava (Manihot esculenta Crantz) under irrigation
conditions in a tropical savanna climate |
| Date of Acceptance |
18 April 2019 |
| Journal |
| Title of Journal |
agronomy-basel |
| Standard |
SCOPUS |
| Institute of Journal |
Basel, Switzerland |
| ISBN/ISSN |
10.3390/agronomy9040206 |
| Volume |
2019 |
| Issue |
9 (4) |
| Month |
April |
| Year of Publication |
2019 |
| Page |
1-27 |
| Abstract |
Photosynthesis performance during early vegetative growth is an important physiological
trait determining yield of cassava, but limited information is currently available for the tropical
savanna climate of Asia. Diurnal photosynthesis and chlorophyll fluorescence of the three-month-old
plants of four commercial cassava genotypes (Rayong 9, RY9; Rayong 11, RY11; Kasetsart 50, KU50
and CMR38-125-77) grown under irrigation, were investigated in three seasons i.e., rainy, cool and hot.
The mean daily net photosynthetic rate (Pn) across genotypes in the rainy season (11.75 molCO2/m2/s)
was significantly lower than that in the cool season (14.60 molCO2/m2/s). Daily mean Pn in the hot
season was 14.32 molCO2/m2/s. In the rainy season, maximum photochemical quantum yield of
PSII (Fv/Fm) and effective quantum yield of PSII photochemistry (FPSII) were significantly higher
than the other seasons, while electron transfer rate (ETR) and non-photochemical quenching (NPQ)
were significantly lower. Genotypic variation was observed during the hot season in which RY11
had the highest and CMR38-125-77 the lowest mean daily Pn. The prominent mechanism to avoid
damages from stress during afternoon in the hot season was to reduce leaf temperature by enhancing
transpiration for RY11; to close stomata early for RY9, and to increase NPQ for CMR38-125-77. |
| Keyword |
cassava genotypes; photosynthetic performance; photosystem II effciency; climatic factors |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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