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頁籤選單縮合
題名 | Drought Stress Effects on Water Relations of Wheat=乾旱逆境對小麥水關係的影響 |
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作者姓名(外文) | Siddique,M. R. B.; Hamid,A.; Islam,M. S.; | 書刊名 | Botanical Bulletin of Academia Sinica |
卷期 | 41:1 2000.01[民89.01] |
頁次 | 頁35-39 |
分類號 | 434.127 |
關鍵詞 | 乾旱; 小麥; 水關係; Drought; Triticum aestivum L; Water relations; |
語文 | 英文(English) |
中文摘要 | 乾旱對四種小麥栽培種( Triticum aestivum L. )水關係的影響在本研究中進 行評估。 Kanchan,Sonalika,Kalyansona 及 C306 四個栽培種置於盆內生長,分別在營 養成長或盛花期以及兩個時期同時以四種不同程度的水逆境處理。植株暴露於乾旱下,葉子 的水勢及相對水含量顯著下降,同時葉子的溫度則增加。較高的葉子水勢與相對含水量及較 低的葉溫常和較高的光合作用率有關聯性。不論在營養成長期或盛花期,乾旱逆境植株比水 分供應充足植株有較高的天蓬溫度。在植株的這兩個發育階段中,連續的逆境處理比只有一 次的逆境處理有較高的天蓬溫度。 |
英文摘要 | Drought effects on the water relations of four wheat (Triticum aestivum L.) cultivars were evaluated. Four cultivars, Kanchan, Sonalika, Kalyansona, and C306, were growth in pots and subjected to four levels of water stress at vegetative or anthesis stages or both. Exposure of plants to drought led to noticeable decreases in leaf water potential and relative water content with a concurrent increase in leaf temperature. The higher leaf water potential and relative water content as well as lower leaf temperature were associated with a higher photosynthetic rate. Drought stressed plants displayed higher canopy temperature than well-watered plants at both vegetative growth and anthesis growth stages. Successive stresses at both developmental stages raised the canopy temperature much higher than in plants stressed only once. |
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