Ontogeny of the Staminate and Ovulate Strobile in Pinus rigida

• 발행기관: 한국육종학회
• 저자명: S. O. Hong(洪性玉) S. K. Hyun(玄信圭) B. S. Lee(李輔植)
• 간행물 정보: 『한국육종학회지』Vol.3 No.2, 52~58쪽, 전체 7쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1971.12.30

국문 초록

雜種採種園 造成에 問題點이 되고있는 兩親樹本의 開花期一致 또는 開花調節을 爲한 基礎硏究로서 本 實驗은 水原地方의 리기다소나무를 材料로 1968년부터 1969년까지 花芽分化 및 花芽의 發育過程을 觀察하여 다음과 같은 結果를 얻었다. 1. 雄花의 原基는 7月下旬에서 8月上旬에 冬芽의 中央部以下 下端部의 冬芽鱗片腋에 形成되었다. 2. 小胞子葉은 8月中旬에서 9月初旬에 分化되었고 造胞組織은 9月中旬과 10月初旬사이에 形成되었다. 3. 造胞細胞의 分裂은10月初旬에서 10月下旬에 第1回分裂을 하고 越冬後 3月中旬에서 4月初旬에 第2回分裂을 完了하였다. 4. 花粉母細胞는 4月中旬에 形成되어 4月下旬에 까지 減數分裂을 完了하고 5月初旬에 開花하여 花粉이 飛散되었다. 5. 雌花의 原基는 8月初旬에서 中旬에 形咸되었다. 6. 苞鱗은 9月中旬에서 10月下旬사이에 第1回分化하고 越冬後 3月中旬에서 下旬에 第2回分化를 하였다. 7. 種鱗은 4月初旬에서 中旬에 形成되고 4月下旬까지 種鱗에서 胚珠가 形成되어 5月初에 開花하였다.

영문 초록

In the present study, initiation and development of staminate and ovulate strobili of Pinus rigida were investigated in order to get basic informations for synchronizing the flowering of parent trees or inducing male sterility of seed trees in the hybrid seed orchard of x Pinus rigitaeda, and the results are summarized as follows: 1) Staminate strobili primordia were initiated in the axil of cataphylls of buds from fate July to early August. 2) Microsporophylls were differentiated during mid August and early September. 3) Sporogenous tissue was formed from mid September to early October. 4) First division of sporogenous cells occurred during early October and late October, and they passed the resting period in winter and the second division of sporogenous cells resumed during mid March and early April. 5) Pollen mother cells were formed in mid April and meiosis of them was completed by late April. Pollens were shed in early May. 6) Ovulate strobili primordia started to be formed during early and mid August. 7) Differentiation of bract scales progressed from mid September to late October and after the resting period in winter they continued to differentiate during mid and late March. 8) Megasporangia were formed during mid and late April on the megasporophylls which developed during early and mid April. In early May ovulate strobili were ready for pollination.

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LITERATURE CITED