Vegetative and generative dynamics of Ixora pseudojavanica and I. coccinea respons to several climatic factors

Abstract

Purwantoro RS. 2016. Vegetative and generative dynamics of Ixora pseudojavanica and I. coccinea respons to several climatic factors. Pros Sem Nas Masy Biodiv Indon 2: 65-70. A study on dynamics of vegetative and generative production on Ixora pseudojavanica Brem. and I. coccinea Hort. in response to the climatic factors had been conducted in Bogor Botanic Gardens from February 2012 to November 2013. Variables observed included flower and young leaves production on each I. pseudojavanica and I. coccinea, and climatic factors namely rainfall, rainy days, humidity and temperature. Descriptive statistics and multiple regression analysis were used to analyze the data. The results showed that rainfall, rainy days, humidity and maximum and minimum temperature significantly affected to flower production of I. coccinea, but not for I. pseudojavanica. However, those climatic components did not significantly effect to young leaves productions on both I. pseudojavanica and I. coccinea. A positive correlation occurred between maximal temperature and flower production and a negative correlation occurred between young leaves production and minimal temperature on I. pseudojavanica. Meanwhile, a negative correlation between maximal humidity and flower production on I. coccinea. Ixora pseudojavanica and I. coccinea were always found in flowering every season.