Influence of High Temperatures on Pollen Vigor and Pollination of Colored Sweet Pepper
|Keywords:||彩色甜椒;花粉;高溫;授粉;Colored sweet pepper;High temperature;Pollen;Pollination||Issue Date:||2008||Publisher:||台中：中興大學園藝系||Start page/Pages:||43-58||Source:||興大園藝,33(3):||Abstract:||
為本研究以12 個彩色甜椒品系為供試材料 (包含田間篩選可能具耐熱潛力的“短筒鐘型” 6 品系與“匈牙利紅椒” 3 品系)，探討高溫(33℃)對彩色甜椒花粉發芽活力之影響，以及生殖生長期之高溫(33/27℃)對彩色甜椒花粉授粉能力與雌蕊受粉能力之影響，以瞭解高溫對彩色甜椒之生殖生理及結實的關係。試驗結果顯示，高溫(33℃)下彩色甜椒的花粉發芽率明顯下降，除‘Chocolate Miniature Bell’29.5%，其餘花粉發芽率皆低於 10.4%。另外，以螢光顯微鏡觀察高溫對花粉管in vivo 生長之影響發現，高溫(33℃/27℃)下分化的花粉之授粉力明顯降低，但高溫發育的雌蕊柱頭及花柱之受粉能力較不受影響。進一步比較不同品系的彩色甜椒在高溫下之結果情形與果實內種子發育之數量發現，與高溫授粉後之花粉管生長的螢光顯微鏡觀察結果一致。綜合評估高溫下花粉發芽活力與授粉結果，以‘Chocolate Miniature Bell’、‘C02080’與‘C00947’等三品系，可能為耐熱性較佳之品系，其中又以‘C02080’為耐熱性表現最好。
In order to assess the heat-tolerance behavior of 12 genotypes of the colored sweet peppers, including 6 bell pepper and 3 of paprika pepper that have been screened in the field and might have heat-tolerance potentiality, had been investigated under high temperature (33 degrees Centigrade) with an aim to evaluate the influence of pollen vigor in vitro and under high
temperatures (33/27 oC) within the teproduction growth period to evaluate the performances of pollination ability of pollen and fertilization ability of pistil. The result of the experiments indicated that high temperature (33oC) significantly reduced the pollen germination rates of
tested colored sweet peppers. Except for ‘Chocolate Miniature Bell’ with 29.5% of pollen germination rate, and the other tested genotypes were all lower than 10.4%. In addition, the influence of the high temperatures (33/27oC) on the growth of pollen tubes was observed by the fluorescent microscope. High temperatures obviously reduced the pollination ability and pollen
tube growth, but the fertilizing ability of pistil was not influenced. The tendency of the fruiting habits and the fruit quantity of tested genotypes under high temperatures were the same as the performances of pollen germination rates and the growing behavior of pollen tubes under the same condition. After generalized assessment about pollen vigor and pollinating results under high temperatures, ‘Chocolate Miniature Bell’, ‘C02080’, and ‘C00947’ should belong to the genotype with better heat-tolerance; however, ‘C02080 ’was the best among them.
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