Growth and physiological characteristics of Abies bornmuelleriana seedlings from diverse provenances and altitudes under varying water availability
Küçük Resim Yok
Tarih
2026
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Climate change alters temperature and precipitation patterns, significantly impacting forest ecosystems and tree species. This research study investigates the effects of altitude and provenance on the early development and physiological responses of Abies bornmuelleriana (Turkish fir) seedlings under different irrigation regimes. Seedlings from two provenances (Karab & uuml;k and Adapazar & imath;, T & uuml;rkiye) and two altitudes (high and low) were subjected to three irrigation treatments [well-watered (3.75 cm/week), moderate drought (1.25 cm/week) and severe drought (0.00 cm/week)] over three growing seasons. Besides morphological traits [RHG (relative height growth) and RCD (root collar diameter)], some physiological features, such as Psi (stem water potential), gas exchange parameters [Anet (net assimilation rate), E (transpiration rate), gs (stomatal conductance), WUEi (intrinsic water use efficiency), Fv/Fm (chlorophyll fluorescence), and Delta C-13 (carbon isotope discrimination) were assessed. Seedlings from a high-altitude source exhibited significantly greater RHG and RCD than those from low-altitudes. Irrigation significantly influenced Psi, with well-watered seedlings maintaining higher Psi values. Gas exchange parameters, including Anet, gs, and E, were significantly higher in well-watered trees, particularly in high-altitude Karab & uuml;k-T & uuml;rkiye seedlings. WUEi was significantly affected by altitude, as trees from higher-altitude provenances had higher WUEi. Severe drought stress reduced Fv/Fm values, indicating physiological strain. Overall, A. bornmuelleriana seedlings from higher altitude provenances demonstrated superior growth and physiological resilience under water stress, suggesting an adaptive advantage in changing climatic conditions. These findings provide insights into selecting resilient provenances for afforestation and conservation efforts in T & uuml;rkiye's climate-vulnerable regions.
Açıklama
Anahtar Kelimeler
[Keyword Not Available]
Kaynak
European Journal of Forest Research
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
145
Sayı
1
