根部缺氧對嫁接番茄水分生理之影響

Influence of Oxygen Deficiency of Root on Water Relation of Grafted Tomato

翁仁憲(Jen-Hsien Weng) ； 張蓉茜(Jung-Chien Chang)

《作物、環境與生物資訊》 1卷1期 (2004/03) Pp. 31-38

https://doi.org/10.30061/CEB.200403.0005

摘要

本試驗以番茄(Lycopersion esculentum)、角茄(Solanum mammosum)及將番茄嫁接於角茄根砧之嫁接個體作為材料，探討不同植物在遭遇缺氧逆境時，其水分生理之變化。結果顯示較耐缺氧之角茄，其根部吸水能力及酒精去氫酵素活性均較高，故在缺氧環境下仍可維持吸水能力、葉片水分潛勢及氣孔導度。而較不耐缺氧之番茄，在缺氧處理後，其根部酒精去氫酵素活性並無明顯提高，根部吸水能力明顯受到抑制，且水分通導度及泌溢速率皆降低，對缺氧環境之敏感程度較角茄為高。將番茄嫁接於角茄根砧上，因角茄根砧能維持根部之吸水能力，使番茄接穗得以維持較佳之水分狀況，而增加對缺氧逆境之耐性。

關鍵字

缺氧 ； 嫁接 ； 番茄 ； 水分生理 ； 呼吸作用

並列摘要

The seedlings of tomato (Lycopersion esculentum), Solanum mammosum and tomato plants grafted onto S. mammosum rootstock were used to investigate their water relations under oxygen deficiency of roots. Under oxygen deficiency condition, tomato seedlings showed inhibition in root respiration and a decrease of root water uptake, leaf water potential and stomatal conductance. However, the anoxia-tolerant species S. mammosum showed higher alcohol dehydrogenase activity and water uptake ability, and could maintain the water potential and the stomatal conductance of leaves under oxygen deficiency of roots. When tomato plants grafted onto S. mammosum rootstock, the responses to oxygen deficiency were observed to be similar to those of S. mammosum.

並列關鍵字

Oxygen deficiency ； Water relation ； Grafted ； Tomato ； Respiration