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題名 | Role of Abscisic Acid (ABA) in Seedling Growth of Corn Plant (Zea Mays L.)(1)--Responses of Corn Seedling to ABA Application=離層酸在玉米幼苗生長中所扮演之角色(1)--玉米幼苗對不同濃度離層酸之反應 |
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作者 | 王慶裕; 朱德民; |
期刊 | 中華民國雜草學會會刊 |
出版日期 | 19941200 |
卷期 | 15:2 1994.12[民83.12] |
頁次 | 頁159-168 |
分類號 | 434.147 |
語文 | eng |
關鍵詞 | 玉米; 幼苗; 離層酸; 生長; Abscisic acid; ABA; Corn (maize); Seedling; Growth; |
中文摘要 | 在作物生產方面如何有效地應用植物生長調節劑於管理栽培上,乃為重要課題。 基本上本試驗乃探討不同濃度之外加離層酸(abscisic acid; ABA)對玉米幼苗生長之影響 及其如何發生影響,結果顯示玉米臺農351號(TNG 351)幼苗在四葉期(V4 stage),以 10 ,10 ,10 及10 M濃度ABA處理根部,不論在陰天及晴天下均以10 M ABA處理後第 三天起抑制葉片生長,而總乾物質生產及株高則在處理後第十天達到最大的抑制作用;至於 10 M ABA 則未見有影響生長之作用。ABA抑制幼苗初期(第三天)生長之主要部位在葉部 ,除正展開葉之伸展受阻外,其二氧化碳交換速率(CER)顯著下降約35%,而osmotic pressure 亦相對增加20% 以及蒸散作用速率顯著下降63%,推測ABA起初可能經由改變葉片氣孔活動而 影響CER。 |
英文摘要 | Yound seedlings of Zea mays L., cultivar Tainung 351 (TNG 351) were subjected to different concentrations of exogenous abscisic acid (ABA) to explore the effect of ABA on seedling growth and development. Roots of seedlings were treated with 10 , 10 , 10 and 10 M of ABA at V4 stage respectively, the growth of the 4th leaf was inhibited on the 3rd day and both plant height and total dry matter production approached maximal inhibition on the 10th day due to 10 M ABA treatment, either under a sunny day or a rainny day. However, no positive effects of ABA treatment on growth and development could be observed, even at the lowest concentration (10 M). Leaf growth was inhibited obviously by ABA within 3 days, which might have resulted from retardation of leaf expansion and from decrement of a carbon dioxide exchange rate (CER)(ca. 35%). In addition, 20% increment of osmotic pressure, as well as 63% decrement of transpiration rate were also founded. It is suggested that CER is inhibited by ABA largely through altering stomatal behavior in a short time. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。