溫度對臺灣山蘇花生長之影響

Effect of Temperature on Growth of Asplenium nidus

臺灣山蘇花葉序為5：8 Fibonacci system，葉片生長呈非典型S型曲線。冬春生育緩慢，夏秋葉片發育快速。在人工氣候室日／夜溫30/25及25/20°C生育品質均佳，30/25°C葉面積增加最多，25/20°C葉背易形成孢子囊群。而在20/15°C下生育緩慢，且有葉片黃化及壞疽之寒害現象。低溫不利氮、鉀、鈣的吸收，極顯著抑制蕨葉生長，降低葉綠素含量，但對葉圓片之光合作用與呼吸作用影響不大。

The effect of temperature on growth of Asplenium nidus L. (Bird's-nest fern) grown in lath house and phytotron at different day/night temperature of 30/25°C, 25/20°C and 20/15°C were studied. The phyllotaxy of the fern was 5:8 Fibonacci system. The development of frond exhibited non-typical S curve growth pattern. The great amount of increase in frond area of the ferns were at temperature range of 20-30°C, the sori formation were only found at 25/20°C. Growth was considerably low and chilling injury was found in fronds which showed the chlorotic and necrotic tissues at 20/15°C. Tissue analysis indicated that plants grown at lower temperature (20/15°C) contained lower nitrogen, potassium and calcium in fronds than plants grown at higher temperature (20-30°C). Different temperature treatments did not have large affect the respiration and photosynthetic value of frond disc. Although their metabolic activity are low.