Effect of tapping activity on the dynamics of radial growth of Hevea brasiliensis trees (Record no. 58183)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03181nam a2200265Ia 4500 |
| 100 ## - MAIN ENTRY--AUTHOR NAME | |
| Personal name | Silpi U |
| 245 #0 - TITLE STATEMENT | |
| Title | Effect of tapping activity on the dynamics of radial growth of Hevea brasiliensis trees |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Name of publisher | Tree Physiology |
| Year of publication | 2006 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Number of Pages | 1579-1587 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | Rubber tree (Hevea brasiliensis Mull. Arg.) radial growth dynamics were monitored with displacement sensors, together with latex production, to investigate three aspects of the dual production of latex and wood: (1) the usefulness of fine-scale dendrometric measurements as a physiological tool to detect water shortage through radial growth; (2) the dynamic aspects, both at the seasonal and at the multi-year scale, of the competition between latex and wood production; and (3) the spatial distribution of radial growth rates around the tapping cut. Radial growth of untapped control trees started with the onset of the rainy season and lasted until the onset of the dry season, ceasing completely during the driest period. Displacement sensors provided a sensitive means of detecting water shortage, with a clear correlaion between diameter variations and changes in water availability (both daily evapotranspiration and monthly rainfall) over the whole annual cycle. However, the correlation was significantly disturbed in tapped trees. After resumption of tapping, the radial growth rate dropped sharply within two weeks and the effect persisted throughout the whole season, so that the cumulative growth of tapped trees was about half that of untapped trees, with the cumulative growth deficit reaching 80;for the period from mid-June to November. This long-known negative impact of tapping on growth was much stronger in the second year of tapping than in the first, whereas latex production increased significantly between the first and second year of tapping. The increased latex production, which could not be ascribed to climatic conditions, shows that the establishment of an artificial latex sink is a progressive, long-term process likely involving many aspects of metabolism. As expected, ethylene significantly increased latex production in both years; however, ethylene had no effect on the growth rates of tapped trees. Radial growth was differentially affected at different locations around the tapping cut, with growth rates significantly lower in the tapped panel than in the untapped panel, and higher above the cut than below the cut. Thus, caution is needed when deriving whole stem wood production from girth measurements at one location on the stem, especially from girth mesurements made close to the tapping cut. This also provides new evidence for the location of the latex regeneration area in the tapped panel, below the cut. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Ethylene |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Latex production |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Radius and diameter variations |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Tapping |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Adam Boris |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ameglio Thierry |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Chantuma Arak |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Gohet Eric |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Kasemsap Poonpipope |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Lacointe Andre |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Thaler Philippe |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Thanisawanyangkura Sornprach |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Journals |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Serial Enumeration / chronology | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Journals | RRII Library | RRII Library | Plant physiology | 01/01/2021 | Volume 26, Issue 12 | Journals |