Seasonal and needle age-related variations in the biochemical characteristics of Pinus nigra subsp. pallasiana (Lamb.) Holmboe

Ayşe Deligöz, Esra Bayar, Musa Genç, YasIn Karatepe, Erol Kirdar and Fatma Gökçe Cankara
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Ayşe Deligöz: Department of Forest Engineering, Faculty of Forestry, Applied Sciences University of Isparta, Isparta, Turkey
Esra Bayar: Department of Forest Engineering, Faculty of Forestry, Applied Sciences University of Isparta, Isparta, Turkey
Musa Genç: Department of Recreation Management, Faculty of Tourism, Giresun University, Giresun, Turkey
YasIn Karatepe: Department of Forest Engineering, Faculty of Forestry, Applied Sciences University of Isparta, Isparta, Turkey
Erol Kirdar: Department of Forest Engineering, Faculty of Forestry, Bartin University, Bartin, Turkey
Fatma Gökçe Cankara: Department of Forest Engineering, Faculty of Forestry, Applied Sciences University of Isparta, Isparta, Turkey

Journal of Forest Science, 2018, vol. 64, issue 9, 379-386

Abstract: Variations in the photosynthetic pigments and total carbohydrate contents of needles of different age classes (current-year, 1-year-old, 2-year-old and 3-year-old) of Pinus nigra subsp. pallasiana (Lambert) Holmboe trees in a young natural stand were investigated during the growing season. In current-year needles, total carbohydrate content was lower during June and July when the needle growth continued than in older age classes, but it was similar to other age classes in the months of August to October. Seasonal patterns of variations in total carbohydrate content were almost similar in 1-, 2-, and 3-year-old needles. Chlorophyll and carotenoid contents increased from May to June, remained relatively constant or declined slightly during summer and autumn in 1-, 2-, and 3-year-old needles. In October, the pigment content was highest in 1-year-old needles, and lowest in 3-year-old needles. Our study indicated that total carbohydrate and pigment contents were affected by needle age classes and seasons.

Keywords: chlorophyll; carotenoid; tree; black pine; soluble sugar (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnljfs:v:64:y:2018:i:9:id:66-2018-jfs

DOI: 10.17221/66/2018-JFS

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