Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi

Türker Oğuztürk

doi:10.35229/jaes.1870719

TR EN

Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi

Abstract

Bu çalışma, Pittosporum tobira (Thunb.) W.T. Aiton yapraklarında klorofil içeriği ile CIELab renk parametreleri (L*, a*, b*) ve sıcaklık arasındaki ilişkileri iki farklı zaman diliminde (13:30 ve 18:00) eşleştirilmiş ölçüm tasarımıyla değerlendirmeyi amaçlamaktadır. Korelasyon analizleri, her iki zaman diliminde de b* ekseninin klorofil ile güçlü ve negatif yönlü ilişkili olduğunu göstermiştir. Çoklu doğrusal regresyon sonuçları, 18:00 saatlerinde açıklayıcılığın arttığını (R²=0.706) ve b* eksenine ek olarak a* ekseni ile sıcaklığın da klorofil için anlamlı tahminleyiciler hâline geldiğini göstermiştir. Buna karşın 13:30 modeli daha düşük açıklayıcılığa sahiptir (R²=0.335) ve yalnızca b* ekseni anlamlı bulunmuştur. Bulgular, yaprak pigmentlerinin optik yansımasının gün içi termal ve ışık koşullarından etkilendiğini ve akşam saatlerinde yapılan renk ölçümlerinin klorofil tahmininde daha güçlü performans sergilediğini düşündürmektedir. Sonuç olarak, CIELab renk uzayının klorofil içerik değerlendirmesinde kullanılabilir olduğu ve ölçüm zamanının optik tahmin doğruluğunda belirleyici bir faktör olabileceği ortaya konmuştur.

Keywords

CIELab, klorofil, Pittosporum tobira, sıcaklık, yaprak rengi.

Investigation of the Relationships Between Chlorophyll, Color, and Temperature in Pittosporum tobira (Thunb.) W.T. Aiton Leaves W.T. Aiton Leaves

Abstract

This study aimed to evaluate the relationships between chlorophyll content, CIELab color parameters (L*, a*, b*), and temperature in Pittosporum tobira (Thunb.) W.T. Aiton leaves using a paired-measurement design at two different time points (13:30 and 18:00). Correlation analyses indicated that the b* axis exhibited a strong and negative association with chlorophyll at both time points. Multiple linear regression results revealed that the explanatory power of the model increased at 18:00 (R² = 0.706), and that, in addition to the b* axis, both the a* axis and temperature became significant predictors of chlorophyll content. In contrast, the 13:30 model exhibited a lower explanatory power (R² = 0.335), with only the b* axis identified as a significant predictor. These findings suggest that the optical reflectance of leaf pigments is influenced by diurnal thermal and light conditions, and that color measurements taken in the evening provide better performance for estimating chlorophyll content. Overall, the results demonstrate the usability of the CIELab color space for chlorophyll assessment and highlight measurement time as a determining factor for improving optical estimation accuracy.

Keywords

ELab, chlorophyll, Pittosporum tobira, temperature, leaf color.

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Details

Primary Language

Turkish

Subjects

Conservation and Biodiversity

Journal Section

Research Article

Authors

Türker Oğuztürk ^*
0000-0002-9611-9959
Türkiye

Publication Date

March 17, 2026

Submission Date

January 24, 2026

Acceptance Date

February 24, 2026

Published in Issue

Year 2026 Number: 2026

DOI

https://doi.org/10.35229/jaes.1870719

IZ

https://izlik.org/JA56PC52HB

APA

Oğuztürk, T. (2026). Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi. Journal of Anatolian Environmental and Animal Sciences, 2026. https://doi.org/10.35229/jaes.1870719

AMA

1.Oğuztürk T. Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi. JAES. 2026;(2026). doi:10.35229/jaes.1870719

Chicago

Oğuztürk, Türker. 2026. “Pittosporum Tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk Ve Sıcaklık İlişkilerinin İncelenmesi”. Journal of Anatolian Environmental and Animal Sciences, nos. 2026. https://doi.org/10.35229/jaes.1870719.

EndNote

Oğuztürk T (March 1, 2026) Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi. Journal of Anatolian Environmental and Animal Sciences 2026

IEEE

[1]T. Oğuztürk, “Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi”, JAES, no. 2026, Mar. 2026, doi: 10.35229/jaes.1870719.

ISNAD

Oğuztürk, Türker. “Pittosporum Tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk Ve Sıcaklık İlişkilerinin İncelenmesi”. Journal of Anatolian Environmental and Animal Sciences. 2026 (March 1, 2026). https://doi.org/10.35229/jaes.1870719.

JAMA

1.Oğuztürk T. Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi. JAES. 2026. doi:10.35229/jaes.1870719.

MLA

Oğuztürk, Türker. “Pittosporum Tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk Ve Sıcaklık İlişkilerinin İncelenmesi”. Journal of Anatolian Environmental and Animal Sciences, no. 2026, Mar. 2026, doi:10.35229/jaes.1870719.

Vancouver

1.Türker Oğuztürk. Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi. JAES. 2026 Mar. 1;(2026). doi:10.35229/jaes.1870719

EBSCOHost Scilit CABI

JAES/AAS-Journal of Anatolian Environmental and Animal Sciences/Anatolian Academic Sciences&Anadolu Çevre ve Hayvancılık Dergisi/Anadolu Akademik Bilimler-AÇEH/AAS

Pittosporum tobira (Thunb.) W.T. Aiton Yapraklarında Klorofil, Renk ve Sıcaklık İlişkilerinin İncelenmesi

Abstract

Keywords

Investigation of the Relationships Between Chlorophyll, Color, and Temperature in Pittosporum tobira (Thunb.) W.T. Aiton Leaves W.T. Aiton Leaves

Abstract

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