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

Wang Xiao Hong
1.354 510

Abstract


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.


Keywords


Bamboo; flowering; physiological mechanism; PCA

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References


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