塩性条件下のトウモロコシおよびヒマワリにおける水とイオンの吸収と輸送

DOI 日本農学文献記事索引 Web Site Web Site 被引用文献10件 参考文献28件

書誌事項

タイトル別名
  • Absorption and Transport of Water and Ions in Corn and Sunflower Plants Grown Under Saline Conditions

この論文をさがす

抄録

In order to analyze absorption and transport of water and ions in plants affecting the salinization in the root zone through physical and physiological processes, we measured water and ion uptake by roots, transpiration rate, leaf conductance, and ion concentrations in root xylem sap and other plant tissues of corn and sunflower grown under saline conditions using a nutrient film technique system. The rate of root water uptake was lower in corn than in sunflower, where the daytime stomatal closure in response to the excessive water stress induced by the saline solution was occurred in corn but not in sunflower. NO3-, PO43- and K+ were highly concentrated in the xylem sap as a result of the active and selective uptake of nutrients by roots of both corn and sunflower. Na+, which is not an essential element for plant growth, was not highly concentrated in the xylem sap or plant tissues of corn because corn exhibited a poor Na+ absorption and transportation ability. On the other hand, sunflower had a greater ability to absorb water, Na+, Mg2+, Ca2+, Cl-, and SO42-, and to transport these ions from the roots to the shoot. These differences in absorption and transport of water and ions indicate that sunflower is more salt tolerant than corn. The effects of these absorption and transport characteristics on plant growth and soil salinity should be taken into account for sustainable and effective plant production in salinized crop fields.

収録刊行物

  • 農業気象

    農業気象 65 (1), 19-26, 2009

    日本農業気象学会

被引用文献 (10)*注記

もっと見る

参考文献 (28)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ