Growth plant water relation and photosynthesis rate of young Theobroma cacao as influenced by water stress


Citation

Mohd Razi I., . and Abd Halim H., . and Kamariah D., . and Mohd Noh J., . Growth plant water relation and photosynthesis rate of young Theobroma cacao as influenced by water stress. pp. 93-98. ISSN 0126-6128

Abstract

The effects of duration of water stress on the growth and physiological changes of young Theobroma cacao plants were investigated. Water was withheld for 4 8 and 12 days before rewatering for a period of 20 weeks. Leaf area leaf area index root and stem dry weights were significantly reduced with duration of witholding water. There was a close relationship between photosynthesis rate and changes in leaf water potential. Leaf photosynthesis rate was reduced when leaf water potential dropped below - 2.0 MPa. Determinations of plant processes showed a clear variation between three local clonal plants i.e. KKM KKM 5 and KKM 25 with KKM 25 recording the highest leaf water potential stomatal conductance and leaf photosynthesis rate


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Abstract

The effects of duration of water stress on the growth and physiological changes of young Theobroma cacao plants were investigated. Water was withheld for 4 8 and 12 days before rewatering for a period of 20 weeks. Leaf area leaf area index root and stem dry weights were significantly reduced with duration of witholding water. There was a close relationship between photosynthesis rate and changes in leaf water potential. Leaf photosynthesis rate was reduced when leaf water potential dropped below - 2.0 MPa. Determinations of plant processes showed a clear variation between three local clonal plants i.e. KKM KKM 5 and KKM 25 with KKM 25 recording the highest leaf water potential stomatal conductance and leaf photosynthesis rate

Additional Metadata

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Item Type: Article
Additional Information: 3 tables 3 fig. 9 ref.; Summaries (En Ms)
AGROVOC Term: THEOBROMA CACAO
AGROVOC Term: FOTOSINTESIS
AGROVOC Term: ESTRES DE SEQUIA
AGROVOC Term: DISPONIBILIDAD DEL AGUA
Depositing User: Ms. Norfaezah Khomsan
Last Modified: 24 Apr 2025 05:56
URI: http://webagris.upm.edu.my/id/eprint/20467

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