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頁籤選單縮合
題 名 | 大豆種子發芽期間耐溼性之研究 (1):種子物理特性與耐濕性 |
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作 者 | 唐士禮; 張新雄; | 書刊名 | 中華農學會報 |
卷 期 | 150 1990.06[民79.06] |
頁 次 | 頁1-21 |
分類號 | 434.215 |
關鍵詞 | 大豆; 物理; 耐溼性; 耐濕性; 發芽期; 種子; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究之目的係針對大豆種子發芽期間耐濕性之問題,以種子大小不同之品種(系)為材料,進行品種間耐濕性差異之比較。而後選定較耐濕與較不耐濕之品種各一種,以及同一品種內大小不同之種子為材料,由種子吸水速率,種皮和子葉破裂率和滲露量等種子物理特性,探討種子耐濕性差異之原因。 茲將結果摘錄如下: 1.二十個大豆品種經測試結果,在正常土壤水分含量下,品種間之種子大小對發芽率之影響不明顯。然而在浸水狀況下,品種間之種子大小與發芽率(r=-0.88**),及成苗率(r=-0.85**)間則呈顯著之負相關,換言之,小粒種之品種較耐濕,而大粒種之品種較不耐濕。 2.在正常與浸水狀況下,種子大小和發芽速率均呈極顯著之負相關。 3.較耐濕之小粒種(G2120)和較不耐濕之大粒種(高雄8號)於浸水狀況下經比較其發芽能力之結果為:小粒種的發芽率仍能維持96.7%,而大粒種則嚴重受到抑制僅為30%,小粒種之平均發芽日數延遲3天,而大粒種延遲6天。小粒種之發芽係數及發芽速率各減少約60%,而大粒種減少約90%。小粒種成苗率降低為77.6%,而大粒種則僅為11.1%。 4.大粒種於浸水狀態下,由於種皮破裂情形較嚴重,子葉破裂率和種皮脫落率均較高,以致種子內物質之滲透量較小粒種顯著為高。因而導致胚軸TTC還原能力較小粒種為低,此為大粒種發芽活力較低之原因。 5.毛豆205品種內大小不同之種子於浸水狀況下經比較其發芽能力之結果為:小粒種之發芽率最高為對照之32.1%,其次為中粒種子26.7%,而大粒種子僅6.3%。各等級之種子平均發芽日數約延遲五天。大,中和小粒種子其發芽係數和發芽速率各約減少98,90和85%。 6.毛豆205品種內大,中和小粒種子其耐濕性差異之原因可能與下列因素有關:種子越大其種皮和子葉破裂率越嚴重,導致種子內滲漏物質量相對的增加。 |
英文摘要 | The objecties of this study were, firstly to evaluate the varietal differences in flooding tolerance; and secondly, to understand the mechanism of flooding tolerance based on physical properties of seed germination. Twenty varieties (strains) of soybean with different seed sizes were used as materials. The results were summarized as follows: 1. No significant effect of seed size on germination was found under normal soil moisture; while under flooded condition, there were negative correlation in both seed size vs. germination (R=-0.88**) and seed size vs. % of seedling stand (R—0.77**). That implied smaller seeds were more tolerant to flooded soil than the larger seeds. 2. A negative correlation was existed between seed size and speed of germination under normal soil moisture condition as well as under flooded condition. 3. germination abilities between smaller seeds (G2120) and larger seed (Kaoshiung 8) were compared under flooded soil condition. Smaller seeds showed higher germination rate (96.7%) than larger seeds (30%). Mean days of germination were delayed for 3 days and 6 days in smaller and larger seeds, respectively. Germination coefficient and speed of germination were decreased around 60% and 90% in smaller and larger seeds, respectively. Percentage of seedling stand were decreased to 77.6% and 11.1% in smaller and larger seeds, respectively. 4. Under flooded condition, larger seeds had more sever testa cracking, and higher percentage of cotyledonary cracking and seed coat loosening than smaller seeds. More leachates were also found from larger seeds than from smaller seeds. The properties described above might therefore be explained to result in the reduction of TTC reducing ability in larger seeds. It implied that the viability and germinating ability of larger seeds were therefore lower than smaller seeds. 5. When comparing the germination abilities of variety VS 205 with different seed sizes under flooding the results showed that smaller seeds also had the higher germination percentage (32.1% of control) than medium seeds (26.7%), or large seed (6.3%). 6. The reason of the differences of flooding tolerance in the variety VS 205 with different seed sizes was similar to that between varieties. The difference was correlated with the increase of the percentage of cracked teata and cotyledon, and alos, the increase of electrical conductivity as seed size was increased. |
本系統中英文摘要資訊取自各篇刊載內容。