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題名 | 吲哚乙酸及離層酸與落花生種子充實之研究 |
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作者姓名(中文) | 施意敏; 朱鈞; | 書刊名 | 中華農學會報 |
卷期 | 154 1991.06[民80.06] |
頁次 | 頁32-45 |
分類號 | 434.253 |
關鍵詞 | 乙酸; 充實; 落花生; 種子; 離層酸; |
語文 | 中文(Chinese) |
中文摘要 | 本試驗係以Virginia型落花生品種Beni Bunch為材料,於莢果發育期間分析莢殼、種子及子房柄IAA(indole-3-acetic acid) 與ABA(abscisic acid) 含量的變化,以探討其與種子充實之關係。將落花生第一對分枝分為上節位區(第5節以上)及下節位區(第1至5節),下節位的莢殼及種子生長速率皆較上節位快,且上節位種子充實情形普遍不良,延長收穫期可能無法改善種子充實的情形。子房柄尖端膨大約0.5cm,子房柄(含種子)所含游離態IAA濃度相當高,當子房柄尖端完全膨大而種子大小約0.5cm時,是種子游離態IAA濃度及含量累積的高峰,隨種子鮮重增加游離態IAA濃度逐漸減少。於相同的發育期,下節位種子游離態IAA濃度明顯較上節位高,游離態IAA濃度增加伴隨著莢殼鮮重急速增加,可能與細胞的增大,或是光合產物的運送有關。游離態ABA含量累積的高峰則是在種子鮮重達最高量的時期,與種子鮮重增加的趨勢相符,推測游離態ABA可能與維持落花生種子繼續生長及乾物質的累積有關。 |
英文摘要 | Changes in abscisic acid (ABA) and indole-2-acetic acid (IAA) int eh pegs, pods and seeds were analyzed during the reproductive development of peanuts (Arachis hypogaea L. CV "Beni Bunch"). The relationships between the levels of ABA, IAA and the seed filling capacity were investigated and the following results were obtained. The first branches of peanuts were divided into basal regions (1st-5th nodes) and apical regions (above 5th nodes). The fruits in basal regions grew more rapidly than those in apical regions. Free IAA concentration of seeds reached the maximum when seed fresh weight increased. At the same developmental stage, the free IAA content and concentration of seeds in basal regions were significantly higher than those in apical regions. The higher IAA concentration in seeds indicated that IAA may be associated with the initiation of seed growth and regulate cell enlargement or sucrose transport. We also found that the highest ABA concentration in seeds of basal regions was correlated positively with seed growth rate. The results suggest that changes in IAA and ABA levels could be important for the physiological regulation of seed growth, and dry matter accumulation during the developing period. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。