レタスの花芽形成並びに茎伸長の制御に関する基礎的研究

生菜花芽形成和茎伸长调控的基础研究

• 批准号: 12760021
• 负责人: 奥田 延幸
• 金额: $ 1.41万
• 依托单位: Kagawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Encouragement of Young Scientists (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12760021/
• 关键词: レタス; 花芽形成; 茎伸長; 発育制御

供試品種は極早生品種の'極早生シスコ'および'マノア'である.花序と花芽の発達段階は,昨年度の実験結果から合計9段階に分け,総苞分化期に達したときに花序が分化したと判断した.まず,茎の伸長と花序形成の制御のために,物理的方法として低温処理の影響を検討した.それぞれの品種の催芽種子を播種して10週間まで自然日長のガラス温室で生育させた.この間,時期(播種直後から3週間後まで)と期間(1から3週間)を組み合わせた12区については,5℃の低温室に移動して低温処理した.その結果,'マノア'で播種10週間後に花序が分化し,低温処理期間が長くなるほど花芽発達段階が低くなる傾向がみられた.この傾向は低温処理開始時期が遅くなるほど顕著であった.'極早生シスコ'では実験期間中に全処理区で花序は分化しなかったが,対照区と比較して低温処理区では花芽発達段階が低くなった.両品種ともに,対照区と比較して,低温処理区の茎は,処理期間が長くなるほど短くなる傾向を示した.次ぎに,化学的方法としてジベレリンの生合成を阻害するウニコナゾール処理の影響を検討した.それぞれの品種の催芽種子を播種して自然日長のガラス温室で生育させた.播種後1週間後に濃度0〜50ppmのウニコナゾールを土壌に処理して11週間まで生育させた.その結果,対照区では播種4週間後から茎の伸長がみられたが,1ppm以上のウニコナゾール処理区では播種8週間後まで茎の伸長が抑制され,5ppm以上ではその影響は顕著であった.また,ウニコナゾール処理区では花序形成が遅延する傾向がみられた.これらの結果から,花序の形成および茎の伸長の制御方法として低温処理並びにウニコナゾール処理の可能性が示唆された.

For food and drink, early birth, early birth, early birth and early birth. The inflorescence reached the stage of flower bud differentiation, and the results of last year showed a total of 9 segments of inflorescence differentiation, bud differentiation and inflorescence differentiation. The inflorescence of the elongated stem is formed to control the inflorescence, and the physical method is used to control the growth of the inflorescence. In the greenhouse, there is a natural daily growth rate in the greenhouse for more than 10 years. During the interval (immediately after sowing, 3 hours after sowing) and between 1 and 3 cycles, the air conditioning in area 12 will be completed, and the temperature in the greenhouse at 5 ℃ will be transferred to the low temperature room. The results showed that the inflorescences differentiated after sowing for 10 years, and the flower buds reached the stage of flower bud differentiation during the period of low temperature. At the beginning of the cryogenic treatment period, the temperature is very low.' The inflorescences in the whole plant were differentiated and the inflorescences in the whole plant were differentiated during the early growing season, and the flower buds in the cold zone were lower than those in the low temperature zone. The temperature is low, the temperature is long, the temperature is short, and the temperature is low. In the second place, the chemical method is used in the synthesis of synthetic materials. The quality of rice is used to promote the sprouting of seeds, to sow natural days, to grow in greenhouses, and to grow babies. After 1 year of broadcasting, the temperature is 0 ~ 50 ppm, the soil temperature is 11, and the birth rate is 11 years. The results showed that the shoot elongation was inhibited after sowing for 4 years in the control area, and the elongation was inhibited after sowing for 8 years in the control area above 1ppm. The seedlings above 5ppm had no effect on the growth of seedlings. The inflorescences were formed in the inflorescence, and the inflorescences were formed. The results show that the inflorescence formation, stem elongation and control of inflorescence growth are sensitive to low temperature and the possibility of plant growth is demonstrated.