Citation
Siti Rubiah Z., . and Kamis A., . (2002) Stomatal conductance in relation to xylem sap abscisic acid concentration in Hopea odorata roxb. and Mimusops elengi linn. seedlings. [Proceedings Paper]
Abstract
Xylem sap ABA and leaf ABA if Hopea Odorata and Mimusops elengi were measured under condition and drought and the role of ABA were investigated in the regulation of stomatal conductance of these two species. A rapid and substantial increase in xylem sap abscisic acid ABA concentration rather than leaf ABA concentration which was closely related to soil drying and stomatal conductance was observed in both species. The increase in xylem sap ABA concentration observed at high bulk density was closely related with reductions of stomatal conductance. These in ability of M. elengi seedlings to produce as much xylem ABA concentration compared to H. odorata seedlings in response to soil compaction and waste stress may have been crucial to its failure to maintain near-normal rates of leaf expansion at certain critical level of compaction.
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Abstract
Xylem sap ABA and leaf ABA if Hopea Odorata and Mimusops elengi were measured under condition and drought and the role of ABA were investigated in the regulation of stomatal conductance of these two species. A rapid and substantial increase in xylem sap abscisic acid ABA concentration rather than leaf ABA concentration which was closely related to soil drying and stomatal conductance was observed in both species. The increase in xylem sap ABA concentration observed at high bulk density was closely related with reductions of stomatal conductance. These in ability of M. elengi seedlings to produce as much xylem ABA concentration compared to H. odorata seedlings in response to soil compaction and waste stress may have been crucial to its failure to maintain near-normal rates of leaf expansion at certain critical level of compaction.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | 6 ill. 1 table. 14 ref. |
| AGROVOC Term: | STOMATA |
| AGROVOC Term: | TRANSPIRATION |
| AGROVOC Term: | WATER POTENTIAL |
| AGROVOC Term: | XYLEM |
| AGROVOC Term: | ABA |
| AGROVOC Term: | RUBBER |
| AGROVOC Term: | RUBBER CROPS |
| AGROVOC Term: | RUBBER INDUSTRY |
| AGROVOC Term: | MALAYSIA |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:13 |
| URI: | http://webagris.upm.edu.my/id/eprint/10986 |
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