Growth, photosynthetic performance and shade adaptation of rubber (Hevea brasiliensis) grown in natural shade (Record no. 60176)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02298nam a2200241Ia 4500 |
| 100 ## - MAIN ENTRY--AUTHOR NAME | |
| Personal name | Senevirathna A M W K |
| 245 #0 - TITLE STATEMENT | |
| Title | Growth, photosynthetic performance and shade adaptation of rubber (Hevea brasiliensis) grown in natural shade |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Name of publisher | Tree Physiology |
| Year of publication | 2003 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Number of Pages | 705-712 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc | We compared growth, photosynthetic performance and shade adaptation of rubber (Hevea brasiliensis Muell. Arg) plants growing in natural shade (33, 55 and 77;reduction in incoming radiation) to control plants growing in full sunlight. Stem diameter and plant height, measured over a 15-month period, were greatest in plants grown in full sunlight, and both parameters decreased with increasing shade. At 7 and 14 months after planting (MAP), total plant dry mass was highest in control plants and lowest in plants in 77;shade. Expansion of the fourth leaf whorl, monitored at 5-6 MAP, was slowest in plants in 77;shade and fastest in unshaded plants, which had more leaves and higher leaf areas and inter-whorl shoot lengths. In response to increasing shade, specific leaf area increased, whereas leaf weight ratio and relative growth rate decreased. Chlorophyll a/b ratio decreased with increasing shade, indicating shade-induced pratitioning of chlorophyll into light-harvesting complexes. Compared to the response in unshaded plants, CO2 assimilation saturated at lower photosynthetic photon flux densities in plants in 77;shade, with a lower upper-asymptote to the light response curve. Chlorophyll fluorescence revealed no evidence of sustained photoinhibitory damage in unshaded plants. Dynamic photoinhibition decreased with increasing shade, with the greatest depression in the ratio of variable to maximal fluorescence around midday. We conclude that shade adaptation and shade-induced reductions in dynamic photoinhibition account for the enhanced early growth of rubber in light shade. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Chlorophyll fluorescence |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Dynamic photoinhibition |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Leaf area ratio |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Leaf weight ratio |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Relative growth rate |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Shade-plants |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Specific leaf area |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical Term | Sun-plants |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Rodrigo V H L |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Stirling C M |
| 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 | Physiology | 29/08/2003 | Volume 23, Issue 10 | Journals |