Use of a High-Pressure Flowmeter for Evaluating Hydraulic Characteristics of Plant Organs and Absorption Functions of Roots

• YASUTAKE Daisuke

  Faculty of Agriculture, Kochi University, B200 Monobe, Nankoku, Kochi 812–8581, Japan

• KITANO Masaharu

  Faculty of Agriculture, Kyushu University, 6–10–1 Hakozaki, Higashi-ku, Fukuoka 812–8581, Japan

• NAGASUGA Kiyoshi

  Graduate School of Bioresources, Mie University, 2072–2 Takanoo-cho, Tsu, Mie 514–2221, Japan

• ARAKI Takuya

  Faculty of Agriculture, Ehime University, 3–5–7 Tarumi, Matsuyama, Ehime 790–8566, Japan</I>

• OSMAN Aksoy Kemal

  Faculty of Agriculture, Kochi University, B200 Monobe, Nankoku, Kochi 812–8581, Japan

• ISHIKAWA Katsumi

  Faculty of Agriculture, Kochi University, B200 Monobe, Nankoku, Kochi 812–8581, Japan

抄録

The hydraulic characteristics of plant organs and the absorption functions of roots of corn and tomato plants were analyzed by using a specialized high-pressure flowmeter (HPFM), which was equipped with a root chamber as well as a coupling to connect to the plant organs. The HPFM can detect changes in the hydraulic properties of the respective parts of the plant body. The hydraulic resistances of the leaf and root decreased with an increase in the water flow rate; this dependence was remarkable at low water flow rates. On the other hand, the hydraulic resistance of the stem was only slightly affected by the water flow. However, a positive linear relationship between hydraulic conductance (reciprocal of resistance) and water flow rate was found for the shoot, stem, and root, respectively. Further, the rate of nutrient (NO₃⁻) absorption by the root was evaluated from the water flow (root water absorption) and NO₃⁻ concentration in the xylem sap exuded from the root stump. The high-pressure flowmeter with the root chamber can be used for studying water and nutrient transport in plants and their responses to environmental elements.

収録刊行物

• Ｅｎｖｉｒｏｎｍｅｎｔ　Ｃｏｎｔｒｏｌ　ｉｎ　Ｂｉｏｌｏｇｙ

  Ｅｎｖｉｒｏｎｍｅｎｔ　Ｃｏｎｔｒｏｌ　ｉｎ　Ｂｉｏｌｏｇｙ 49 (2), 99-105, 2011

  日本生物環境工学会

キーワード

• HPFM
• hydraulic resistance and conductance
• root absorption
• water and nutrient transport

詳細情報

• CRID: 1390282680237012480
• NII論文ID: 10029323397
• NII書誌ID: AA12029220
• DOI: 10.2525/ecb.49.99
• ISSN: 18830986
• ISSN: 1880554X
• NDL書誌ID: 11153909
• Web Site: http://id.ndl.go.jp/bib/11153909
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11153909
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可