| Summary: | 碩士 === 國立宜蘭大學 === 森林暨自然資源學系碩士班 === 101 === In this study, Azedarach(Melia azedarach), Pongamia(Pongamia pinnata) and Common Garcinia(Garcinia subelliptica),which are three coastal species were tested material. The 6-8month old seedlings were growing in different shade treatments which were full light(LF;Relative light 100%),medium light(LM;Relative light about 50%) and low light(LL;Relative light about 5%) for six months. When the seedlings were domesticated, stopped the water supply until to soil moisture content 20%, 10% and 5%, and observed the physiological response, physiological plasticity and chlorophyll fluorescence recovery. The result showed M. azedarach and P. pinnata are best maximum photosynthetic rate were 16.90 μmolCO2m-2s-1 and 13.80 μmolCO2m-2s-1 in LF. G. subelliptica shows best maximum photosynthetic rate were 6.24 μmolCO2m-2s-1 in LM. M. azedarach shows best water stress tolerance in LF and LM because that ΦPSII was not inhibited in drought conditions. P. pinnata’s ΦPSII was reduced in 20% soil moisture content in any light treat and shows slower recovery after drought. G. subelliptica has worst recovery in full sunlight, but it has better drought tolerance and recovery in other light treats.
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