ÖZETAllokasyon organizmaların büyüme, hayatta kalma ve üreme fonksiyonlarını yerine getirmek üzere, kaynakları (enerji, biyomas, besin elementleri vs.) organları arasında paylaştırmasıdır. Bitkiler oldukça değişkenlik gösteren ekolojik faktörler ve bitkiye bağlı içsel faktörlerin (genetik, ontogenik, yaş, yaşam formu, vs.) etkisiyle, optimal bir kaynak taşıma (allokasyon) modeli geliştirerek başarılı olmaya çalışırlar. Bu nedenle bitkiler evolusyonel süreçler içinde, hayatta kalmalarını sağlayan birbirinden oldukça farklı allokasyon modelleri oluşturmuşlardır. Anahtar Kelimeler: Allokasyon modeli, ekofizyoloji, ekolojik faktörler ABSTRACTAllocation is the sharing of resources (energy, biomass, nutrients, etc.) between organs in order to fulfill the growth, survival and reproductive functions of organisms. Plants try to be successful by developing an optimal pattern of resource mobilization (allocation) with the influence of highly variable ecological factors and plant-related internal factors (genetic, ontogenic, age, lifeform, etc.). For this reason, plants have formed very different allocation patterns that allow them to survive in evolutionary processes.

SpatIo-temporal varIatIonS In allocatIon of macronutrIentS InSmIlax excelSa l. (lIlIaceae)Hasan KorKmaz 1 * , Safinaz alKan 1 & Ümmügülsüm mumcu 1 réSumé.-Variations spatio-temporelles de l'allocation des macronutriments chez Smilax excelsa l. (liliaceae). -l'allocation des nutriments (n, p et K) dans la liane Smilax excelsa a été étudiée dans divers habitats au long de la saison de croissance. les concentrations de macronutriments (à l'exception de la concentration en K foliaire) différaient de manière significative selon la saison. De même, des différences significatives des concentrations ont également été observées entre les stations échantillonnées, sauf pour N des tiges et rhizomes et K des rhizomes. Les concentrations de macronutriments du sol différaient significativement selon les stations mais pas selon les saisons. Les S. excelsa des canopées ouvertes et celles en position émergente allouaient davantage de macronutriments aux fruits que celles des canopées fermées ou en position de surcimées.Summary. -allocation patterns of macronutrients (n, p and K) of a liana species Smilax excelsa were investigated in different habitats and along growing season. Macronutrient concentrations significantly differed according to the season (except for leaf K concentration). Similarly, significant differences were also found among sampling stations except for stem and rhizome N and rhizome K% concentrations. Soil macronutrient concentrations were significantly different among studied stations, but not among seasons. S. excelsa individuals occurring in open canopies and overstory positions allocated more macronutrients to fruits as compared to those occurring in closed canopies and understory positions.