Citation
Zainab H., . and Siti Arija M. A., . and Sivakumaran S., . and Faridah Y., . and Ghandimathi H., . and Yeang H. Y., . Changes in some physiological latex parameters in relation to over-exploitation and the onset of induced tapping panel dryness. pp. 182-198. ISSN 0127-7065
Abstract
As tapping panel dryness of the rubber tree developed in response to various stress treatments significant changes in invertase and polyphenol oxidase activities total sugars and total solids in the latex were found to be associated with the intensive tapping and ethephon treatments. These changes appeared to be related more to the exhaustion of the laticifer system (over-exploitation) than to the basic causes of dryness. They were unreliable predictors of dryness in situations where the dryness was not accompanied by increased yield output as exemplified by the pin-pricking stress treatment. In the early stages of the stress treatments latex proline and copper content increased with all the experimental treatments attempted irrespective of whether yield output was increased. These results suggest that an increase in latex proline or latex copper might serve as a warning indicative of incipient or impending dryness.
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Abstract
As tapping panel dryness of the rubber tree developed in response to various stress treatments significant changes in invertase and polyphenol oxidase activities total sugars and total solids in the latex were found to be associated with the intensive tapping and ethephon treatments. These changes appeared to be related more to the exhaustion of the laticifer system (over-exploitation) than to the basic causes of dryness. They were unreliable predictors of dryness in situations where the dryness was not accompanied by increased yield output as exemplified by the pin-pricking stress treatment. In the early stages of the stress treatments latex proline and copper content increased with all the experimental treatments attempted irrespective of whether yield output was increased. These results suggest that an increase in latex proline or latex copper might serve as a warning indicative of incipient or impending dryness.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Hevea |
| AGROVOC Term: | Rubber crops |
| AGROVOC Term: | Latex |
| AGROVOC Term: | Overexploitation |
| AGROVOC Term: | Tapping |
| AGROVOC Term: | Physiological response |
| AGROVOC Term: | Stress |
| AGROVOC Term: | Ethephon |
| AGROVOC Term: | Susceptibility to dryness |
| AGROVOC Term: | Auxins |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 03:58 |
| URI: | http://webagris.upm.edu.my/id/eprint/23391 |
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