PHYSIOLOGICAL METABOLIC ANALYSIS AND KEY FACTORS DURING Phyllostachys heteroclada Olive AND Neosinocalamus affinis KingFLOWERING

Phyllostachys heteroclada zeytin bambu (P. Het) ve Neosinocalamus affinis kral bambu (N. Aff) 2003-2007 yılları arasında Çin’in Ya’an bölgesinde vejetatif faaliyet göstermiştir. Bu çalışmada bu iki bambu türünün metabolik göstergeleri belirlenmiş ve çiçeklenmeyi en belirleyici faktör temel bileşenler analizi (PCA) ile tespit edilmiştir. Elde edilen sonuçlar GA (Gibberellin), GA/ABA (Gibberellin/Abscisic Asit) bambuların çiçek açmasında en belirleyici metabolitler olduğu, bunu nişasta, amilaz faaliyeti ve çözülebilen şekerlerin izlediği ve tümüne ait değerlerin çiçeklenme aktivitesi ile pozitif korelasyon gösterdiği belirlenmiştir. ZT (Zeatin) maddesi ile bambuların çiçek açması arasında negatif korelasyonun bulunduğu, bu maddenin çiçek açmayı engellediği ve faaliyeti durdurmaya çalıştığı tespit edilmiştir. Bugüne kadar yapılan çalışmalardan ve bu çalışmadan elde edilen sonuçlara dayanarak çok karmaşık bir süreç olan bambuların çiçek açması sürecini açıklayan bir model oluşturulmuştur. Kuraklık ve yüksek sıcaklıklar gibi sert iklim koşulları gibi dış faktörler ile GA, GA/ABA, nişasta, amilaz faaliyeti ve çözülebilen şekerlerin bambuların çiçek açması üzerinde pozitif yönde teşvik edici veya tersi yönde etkilerde bulunarak bambuların çiçek açması olgusunda değişik durumlara yol açmaktadır

Physiological Metabolic Analysis and Key Flowering Factors During Phyllostachys heteroclada Olive and Neosinocalamus affinis Keng Flowering

P. Het (Phyllostachys heteroclada olive) and N. Aff (Neosinocalamus affinis Keng ) flowered from 2003 to 2007 in Ya'an district in China. We determined metabolism indices of these two bamboo species, and analyzed the key flowering metabolism factors by PCA (principal component analysis). The result showed that GA, GA/ABA were the most important factors of bamboo flowering, followed by starch, amylase activity and soluble sugar, all of which were positively correlated with bamboo flowering. ZT was negatively correlated to bamboo flowering, it obstructed bamboo flowering and contributed to bamboo flower reversion. Based on the above and former research, we built a bamboo flowering model which showed that bamboo flowering is a long and complicated process. External factors, especially harsh environments such as droughts and high temperatures and internal mechanisms such as GA, GA/ABA, starch, amylase and soluble sugar would possibly accelerate or terminate growth and florescence, making bamboo florescence highly variable.

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