Impacts of wet and dry periods on leaf gas exchange water use efficiency and carbon isotope discrimination in different oil palm materials

Afifah Abd.Razak, . and Haniff M. H., . Impacts of wet and dry periods on leaf gas exchange water use efficiency and carbon isotope discrimination in different oil palm materials. pp. 693-701. ISSN 1511-2780

This study was conducted to investigate the effects of two different periods (i.e wet and dry) and five different oil palm materials i.e. tenera (DxP) and clonal palms (i.e. PL68 PL104 PL106 and PL127) on leaf carbon isotope discrimination (”) leaf gas exchange parameters such as net photosynthesis (PN) stomatal conductance (gs ) transpiration rate (Tr ) ) intercellular CO2 concentration (ci) and instantaneous water use efficiency (WUE) and their relationships in different oil palm materials cultivated on peat. Leaf gas exchange of 8-year old DxP and clonal palms were determined during dry and wet periods which were also analysed for leaf ”. Results showed that there were significant differences in PN gs and Tr between different periods. The gs values decreased by 54 during dry period compared to the wet period. This reduction in gs led to a reduction of 59 and 44 in PN and Tr respectively. The interaction effect between oil palm materials and different periods had a significant influence on the leaf ” values. Leaf ” in clonal palm PL106 was less discriminated (23.740.42) compared to the DP palm during dry season (27.920.70). A negative relationship was observed between leaf ” with instantaneous WUE and leaf was found to be highly correlated with ci in oil palm during the wet period.

Full text available from: Official URL: http://jopr.mpob.gov.my/impacts-of-wet-and-dry-per...

Abstract

This study was conducted to investigate the effects of two different periods (i.e wet and dry) and five different oil palm materials i.e. tenera (DxP) and clonal palms (i.e. PL68 PL104 PL106 and PL127) on leaf carbon isotope discrimination (”) leaf gas exchange parameters such as net photosynthesis (PN) stomatal conductance (gs ) transpiration rate (Tr ) ) intercellular CO2 concentration (ci) and instantaneous water use efficiency (WUE) and their relationships in different oil palm materials cultivated on peat. Leaf gas exchange of 8-year old DxP and clonal palms were determined during dry and wet periods which were also analysed for leaf ”. Results showed that there were significant differences in PN gs and Tr between different periods. The gs values decreased by 54 during dry period compared to the wet period. This reduction in gs led to a reduction of 59 and 44 in PN and Tr respectively. The interaction effect between oil palm materials and different periods had a significant influence on the leaf ” values. Leaf ” in clonal palm PL106 was less discriminated (23.740.42) compared to the DP palm during dry season (27.920.70). A negative relationship was observed between leaf ” with instantaneous WUE and leaf was found to be highly correlated with ci in oil palm during the wet period.

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Item Type:	Article
AGROVOC Term:	Oil palm
AGROVOC Term:	Gas exchange
AGROVOC Term:	Water use efficiency
AGROVOC Term:	Isotopes
AGROVOC Term:	Carbon
AGROVOC Term:	Wet season
AGROVOC Term:	Dry season
AGROVOC Term:	Clones
AGROVOC Term:	Photosynthesis
AGROVOC Term:	Stomatal conductance
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24978

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