Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/28398
標題: 低溫處理對分蔥鱗莖花芽分化之影響
Influence of Low Temperature on Flower Bud Differentiation of Shallot (Allium cepa L. Aggregatum group) Bulbs
作者: 郭濰如
Kuo, Wei-Ru
關鍵字: 分蔥鱗莖
低溫處理
出版社: 園藝學系
摘要: 分蔥“佳里”、“學甲”及“菲律賓”三品種鱗莖以5、10及15℃,在分蔥鱗莖採收後之第一個月與以10℃在約採收後第五個月時開始處理,二者皆以25℃為對照組,探討低溫處理對分蔥鱗莖花芽分化之影響,期能建立溫度與花芽分化關係之基本資料,同時調查低溫處理對鱗莖失重率、萌芽率及低溫處理後種植植株分蘗數與分蘗數之影響,以供未來分蔥在繁殖及雜交育種時之參考與應用。 分蔥鱗莖三品種之失重率隨處理週數之增加而增加,且以“菲律賓”失重率為最高,“佳里”居次,“學甲”失重率最小,至第八週時,分別為27.2% 、24.7%及21.7%,而品種間除第一週外,都有極顯著之差異。在鱗莖大小上,小球之失重率比大球大,且處理8週間都呈極顯著差異。在溫度方面,失重率隨處理溫度增加而提高,其間有極顯著差異,而處理期間並未發現鱗莖有乾枯者。在實驗二,失重率之高低順序為“佳里”、“菲律賓”、“學甲”,至第八週失重率分別為47.6%42.7%、34.2%。對於不同溫度處理間,仍以25℃之失重率較大。在品種方面,除之第一、二週外,品種間都為極顯著差異。在乾枯率方面,25℃比10℃乾枯率高,且以“佳里”最為嚴重,第八週時達73.3%,“菲律賓”次之,以“學甲”最為輕微,但在10℃下之“佳里”與“學甲”未有乾枯之情形。 低溫處理對萌芽率之影響,品種間有極顯著差異,以“菲律賓”為最高,“佳里”次之,“學甲”為最少,至第八週時分別為31.8%、18.8%及5.73%。在鱗莖大小間則無差異。處理溫度間則以10℃為最高,5℃居次,再來為15℃,以25℃為最低,至第八週時萌芽率分別為29.2%、27.8%、16.7%及1.39%、實驗二萌芽率大小順序與實驗一結果相類似,且10℃之萌芽率仍比25℃高。 利用石蠟切片法,觀察經頂花芽分化情形,“佳里”大小鱗莖,經5、10、15、25℃處理8週與這4種溫度8週後種植之4週內,都未有花芽分化之現象。在“學甲”則10℃經處理8週之小球及大球在種植後2週各有12.5%及37.5%之花芽分化率。而“菲律賓”在溫度處理前,大小鱗莖內之花芽分化率分別為25.0%與12.5%,以5、10及15℃處理6週時,大小鱗莖都有62.5%之花芽分化率為最高,以後則逐漸下降;在對照組,大球至第八週時有50.0%,小球則在第六週25.0%時最高。對於種植後之8週內各品種都沒有抽苔之情形。而實驗二,在石蠟切片中都未見到有花芽分化之情形,但在處理後種植田間,種植後第四週時有抽苔情形,大小球分別有6.67%與3.33%之抽苔率,至種植後第六週,則依處理4、6、8週者抽苔率分別為6.67%、6.67%及10.0%,以後就不再增加。 種植後植分蘗數,主要受品種間之影響,而溫度處理週數間並無顯著差異,其中以“佳里”分蘗最多,至第五週達7枝後不見再增加,而“學甲”與“菲律賓”之差異不大,而分蘗數隨定植週數增加而增加,至第八週時約有5∼6枝分蘗。
Two local shallot cultivars "Chia-Li", "Shwei-Chia" and one introduced shallot cultivar "Philippine" were used to study the effects of low temperatures on flower bud differentiation in bulbs. They were treated in 5, 10, 15 and 25℃ for 8 weeks after harvest 1 month or in 10℃ and 25℃ for 8 weeks after harvest 5 months. By this research, the relationship between low temperatures and the differentiation of flower buds in shallot bulbs were expected to be understood. This knowledge can help the sexual reproduction and the breeding of shallot. The weight of bulbs loss cintinuously increased during the period of the treatment in the first experiment. "Philippine", "Chia-Li" and "Shwei-Chia" had 27.2%, 24.7% and 21.7% weight loss, respectively, in the 8th week. The weight loss from bulbs were significantly different among the varieties except the lst week. The weight loss in small bulbs were significantly higher than those in the large bulbs during the period of the treatment. As the treated temperatures increased, the weight of bulbs loss were increased. The shrunken bulbs were absent in all treatments. In the second experiment, the percentage of bulb weight loss was 47.6%, 42.7% and 34.2% in "Chia-Li", "Philippine", "Shwei-Chia", respectively, in the 8th week, It was extremely significantly different among varieties during the treatment except the lst and 2nd week. Both the loss weight and the shrunken bulbs at 25℃were higher than those at 10℃. The highest percentage of the shrunken bulb of "Chia-Li" was 73.3% in the 8th week, then "Philippine" and "Shwei-Chia". The shrunken bulb of "Chia-Li" and "Chwei-Chia" did not have shrunken bulb in the 10℃ treatment. The percentage of sprouting of shallot bulbs among varieties were extremely significantly different. The value was 31.8% in "Philippine", 18.8% in "Chia-Li", and 5.73% in "Shwei-Chia" in the 8th week during the period of treatment. The percentage of sprouting between the large bulbs and small bulbs had not different. The 10℃ treatment had the highest percentage of sprouting to be 29.2%, then 27.8% in 5℃, 16.7% in 15℃, and 1.39% in 25℃ in the 8th week. The sprouting of bulbs in 10℃ were higher than those in 25℃. The flower bud differentiation of "Chia-Li" shallot bulbs was not observed in all treatments. In "Shwei-Chia", the percentage of sprouting was 12.5% in the large bulb and 37.5% in small bulbs in the 8th week. In "Philippine", there were 25.0% flower bud in large bulbs and 12.5% in small bulbs before temperature treatment. The highest number of flower bud in "Philippine" was observed in 10℃ in the 6th week during the period of treatment. This value was 62.5%. There was 50.0% flower bud in large bulbs in 25℃ in the 8th week, and 12.5% in small bulbs in the 4th week. After the temperature treatment, the bulbs were planted in the field. There was not bolting in all treatments in the first experiment. The flower bud differentiation in bulbs was not observed from the paraffin section in the second experiment. But the Bolting was observed in the 4th week after planted. The percent of bolting from bulbs treated for 4, 6, 8 weeks in 10℃ had 6.67%, 6.67% and 10.0%, respectively, in the 8th week. The tillers in bulbs after planted were affected by the varieties but not the treated temperatur and weeks. In "Chia-Li" had the highest, seven stalks in the 5th week after panted planted. There were 5~6 stalks in the bulbs of "Shwei-Chia" and "Philippine" after planted eight weeks.
URI: http://hdl.handle.net/11455/28398
Appears in Collections:園藝學系

文件中的檔案:

取得全文請前往華藝線上圖書館



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.