Comparing morphological traits and chlorophyll fluorescence in sun and shade leaves of eucalyptus hybrid in an ex-tin mine

Ho, Wai Mun and Rosdi Koter, . and Mohd Zaki Abdullah, . and Dasrul Iskandar Darus, . and Fatin Nadiah Sukhairi, . and Salmah Baharuddin, . and Nazwin Ahmad, . (2024) Comparing morphological traits and chlorophyll fluorescence in sun and shade leaves of eucalyptus hybrid in an ex-tin mine. Journal of Tropical Plant Physiology (JTPP) (Malaysia), 16. pp. 18-25. ISSN 1985-0484

Selecting suitable tree species is one of the most important factors determining the success of rehabilitation initiatives or projects in degraded areas such as ex-mining sites. The ability of selected trees to survive and establish in these areas can be explained physiologically through examination of their leaves. Among four species planted in May 2022 in an ex-tin mining area in Malim Nawar, Perak, this study has chosen to focus on the Eucalyptus hybrid due to its superior survival and growth. A total of four E. hybrid trees were selected with an average height of 2.71 ± 0.65 m and collar diameter of 36.23 ± 8.75 mm. Five sun leaves and another five shade leaves were sampled from each tree for measurements of leaf area, moisture content, chlorophyll and plant efficiency. Sun leaf was found to have significantly higher (p < 0.01) length and width compared to shade leaf which contributed to a larger area for the sun leaf (28.40 ± 3.98 cm2) than that of the shade leaf (22.88 ± 5.16 cm2). Sun leaf also had higher chlorophyll content compared to shade leaf (p< 0.05). The Chl-a fluorescence analysis results indicated better photosynthetic performance in sun leaves with higher PIABS and PItotal than shade leaves. Our findings thus showed the morphological adaptation as well as physiological responses of sun and shade leaves of Eucalyptus hybrid when planted in an open degraded area.

Full text available from: Official URL: https://www.jtpp.org.my/volume/16_1/vol16_1_articl...

Abstract

Selecting suitable tree species is one of the most important factors determining the success of rehabilitation initiatives or projects in degraded areas such as ex-mining sites. The ability of selected trees to survive and establish in these areas can be explained physiologically through examination of their leaves. Among four species planted in May 2022 in an ex-tin mining area in Malim Nawar, Perak, this study has chosen to focus on the Eucalyptus hybrid due to its superior survival and growth. A total of four E. hybrid trees were selected with an average height of 2.71 ± 0.65 m and collar diameter of 36.23 ± 8.75 mm. Five sun leaves and another five shade leaves were sampled from each tree for measurements of leaf area, moisture content, chlorophyll and plant efficiency. Sun leaf was found to have significantly higher (p < 0.01) length and width compared to shade leaf which contributed to a larger area for the sun leaf (28.40 ± 3.98 cm2) than that of the shade leaf (22.88 ± 5.16 cm2). Sun leaf also had higher chlorophyll content compared to shade leaf (p< 0.05). The Chl-a fluorescence analysis results indicated better photosynthetic performance in sun leaves with higher PIABS and PItotal than shade leaves. Our findings thus showed the morphological adaptation as well as physiological responses of sun and shade leaves of Eucalyptus hybrid when planted in an open degraded area.

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Item Type:	Article
AGROVOC Term:	Eucalyptus
AGROVOC Term:	leaves
AGROVOC Term:	rehabilitation
AGROVOC Term:	planting
AGROVOC Term:	measurement
AGROVOC Term:	chlorophyll fluorescence
AGROVOC Term:	leaf area
AGROVOC Term:	chlorophyll content
Geographical Term:	Malaysia
Depositing User:	Ms. Azariah Hashim
Date Deposited:	11 Feb 2026 03:29
Last Modified:	11 Feb 2026 03:29
URI:	http://webagris.upm.edu.my/id/eprint/3184

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