Growth and photosynthetic response of four Malaysian indigenous tree species under different light conditions

A. Mohamad Azani, . and Yoneda R., . and M. Nik Majid, . and Kenzo T., . and Matsumoto Y., . Growth and photosynthetic response of four Malaysian indigenous tree species under different light conditions. pp. 271-281. ISSN 0128-1283

Growth and photosynthetic response of four indigenous tree seedlings i.e. Dyera costulata Dipterocarpus baudii Neobalanocarpus heimii and Gonystylus affinis were studied under different light conditions in a degraded secondary forest. Maximum photosynthesis (A max) was measured at 2 and 12 months after planting. The ratio of variable to maximum fluorescence (Fv/Fm) was determined. Leaves measured at 2 and 12 months after planting were old leaves present on the seedlings and new leaves that had expanded after planting respectively. Seedling growth was measured over four years. Changes in the growth rate and A max with canopy openness were categorised into two groups. The growth and A max of the first group (D.costulata and D. baudii) were maximum at 30“40 canopy openness. This group may be suitable for planting under large canopy gaps. The second group (G.affinis and N. heimii) showed maximum growth and A max at relatively low canopy openness (less than 20). Leaves in the second group suffered chronic photoinhibition under large gap. These species were suitable to be planted under low light condition.

Full text available from: Official URL: http://www.frim.gov.my/v1/JTFSOnline/jtfs/v23n3/27...

Abstract

Growth and photosynthetic response of four indigenous tree seedlings i.e. Dyera costulata Dipterocarpus baudii Neobalanocarpus heimii and Gonystylus affinis were studied under different light conditions in a degraded secondary forest. Maximum photosynthesis (A max) was measured at 2 and 12 months after planting. The ratio of variable to maximum fluorescence (Fv/Fm) was determined. Leaves measured at 2 and 12 months after planting were old leaves present on the seedlings and new leaves that had expanded after planting respectively. Seedling growth was measured over four years. Changes in the growth rate and A max with canopy openness were categorised into two groups. The growth and A max of the first group (D.costulata and D. baudii) were maximum at 30“40 canopy openness. This group may be suitable for planting under large canopy gaps. The second group (G.affinis and N. heimii) showed maximum growth and A max at relatively low canopy openness (less than 20). Leaves in the second group suffered chronic photoinhibition under large gap. These species were suitable to be planted under low light condition.

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Item Type:	Article
AGROVOC Term:	Light requirements
AGROVOC Term:	Seedlings
AGROVOC Term:	Dyera costulata
AGROVOC Term:	Dipterocarpus
AGROVOC Term:	Gonystylus
AGROVOC Term:	Secondary forests
AGROVOC Term:	Photosynthesis
AGROVOC Term:	Fluorescence
AGROVOC Term:	Planting
AGROVOC Term:	Growth
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	26 Apr 2025 14:21
URI:	http://webagris.upm.edu.my/id/eprint/21459

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