溫度對稜角絲瓜開花和結果的影響

The angled loofah ( Luffa acutangula (L.) Roxb.) is a tropical oriental
vegetable, and the best growth temperature are between 20℃to 30℃. There
were no chilling tolerance lines identified. The objectives of this study were to
screen the angled loofah germplasma for chilling tolerance lines and investigate
the pollen viability under low temperature. In the preliminary screen, line
85022 revealed its chilling tolerance potential from the vigor growth, good fruit
set (open-pollinated), and seed number per fruit, which might result in less
effect of lower temperature towards its reproduction growth. The pollen
germination percentage of line 85022 taken after incubating 4 hours at 13℃and
10℃were 62.36% and 38.27%, respectively; while other tested lines were less
than 15%. Comparing the fruit length of winter field grown, winter greenhouse
grown, and the summer grown angled loofah, line 85022 showed no significant
difference; however, San-C carried no winter field grown fruits and the winter
greenhouse grown fruits were only 50% in length than summer grown fruits.
The growth and fruiting in the winter and pollen germination percentage at
lower temperature revealed line 85022 was chilling tolerance.