頁籤選單縮合
題 名 | 薺(Capsella bursa-pastoris)種子在變溫條件下的發芽 |
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作 者 | 郭華仁; | 書刊名 | 國立臺灣大學農學院研究報告 |
卷 期 | 34:1 1994.03[民83.03] |
頁 次 | 頁9-20 |
分類號 | 433.58 |
關鍵詞 | 薺; 種子; 休眠; 發芽; 變溫; Capsella bursa-pastoris; Seed; Dormancy; Germination; Alternating temperature; |
語 文 | 中文(Chinese) |
中文摘要 | 在溫階板14X14個變溫組合下進行薺,Capsella bursa-pastoris (L.)Medik種 子的發芽試驗,溫度範因為2.4-38.5℃。結果顯示,在恆溫下薺種子發芽率不高, 最高溫為24.8℃,最適溫(To)為13.6℃,最低溫為2.4℃。在變溫的條件下,薺種 子的發芽率較高,最適平均溫在8-16℃之間,最適溫差約在8-16℃之間。平均溫 超過25℃時,不論日夜溫度各為何,種子皆完全無法發芽。若以13.6℃恆溫組合, 即TO為軸心,將溫階板分成四象限,第一(高、低溫皆>To),及第三(高、低溫皆 ≦To)象限的變溫組合中,平均溫及溫差分別與發芽率的機率值呈直線關係,符 合模式G=gi+aiT+biA+ciTA+diPiA;第二、四象限(高溫>To,低溫≦To)者,平均溫 及溫差分別與發芽率的機率值呈二次關係,符合模式 G=gi+aiT+biT2+ciA+diA2+eiAT;其中G為各方格發芽率的機率值,T為各方格日平 均溫度,A為各方格之溫差,P;為高溫期,gi、ai、bi、ci、di、ei為常數。由各方 格的平均溫度、溫差與常數所估算的發芽圖譜,與觀測的發芽圖譜很接近,顯示 此二模式有效地描述薺種子在變溫條件下的發芽。 |
英文摘要 | Seeds of Capsella bursa-pastons (L.) Medik were tested, for aduration of 14 days, on a temperature gradient plate that contained14 X 14 cells of various combinations of daily cycle of temperatureshift ranging from 2.4 to 38.5℃. The seeds germinated poorly underconstant temperatures. The optimum constant temperature or Tooccurred at 13.6 ℃ . The maximum and minimum constanttemperatures were 24.8 and 2.4℃ respectively. Within the alternatingtemperature regime, the optimum mean temperatures were between8-16℃, and the optimum temperature amplitudes were between 8-16℃.The maximum mean temperature was 25℃. A system of right-angledcoordinates was applied to the germination map. The whole 196 cellswere divided into four quadrants with the cell of 13.6 ℃ constanttemperature as the origin of coordinates. Then (1), in the firstquadrant where minimum temperature>To, or in the third quadrantwhere maximum temperature <=To, linear relationship existedbetween probit germination and both mean temperature andmagnitude of temperature shift; (2), In the second or fourthquadrants where maximum temperature > To and minimumtemperature <= To, the relationship between probit germination andboth mean temperature and cycle amplitude were quadratic. The tworelationships could be described by the following two models respectively: when (1), G=gi+aiT+biA+CiTA+diPiA, when (2), G=gi+ aiT + biT2 + ciA + diA2 + eiAT, G=probit germination, A=amplitude, T=mean temperature, P=hours of high temperature duration in a day cycle. The germination map could be reconstructed by mean temperature, temperature amplitude, high temperature period of each cell and constants such as a, b, c, d, e, and g, indicating the plausibility of the two models. |
本系統中英文摘要資訊取自各篇刊載內容。