Methodological establishment for individual evaluations of hydraulic conductances of node, internode and leaf insertion in a nodal complex

K. Nagasuga, Daisuke Yasutake, T. Araki, Kitano Masaharu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

A pressure flow meter system was newly developed for measuring hydraulic characteristics of plant organs. In the system, the pressurized water flow through plant organs was given at a desired rate by regulating the applied pressure, and hydraulic resistance or conductance of plant organs was determined from the flow rate and the applied pressure at intervals of about 5 minutes. By applying the system, individual evaluations of hydraulic characteristics of node, internode and leaf insertion in a nodal complex were performed on the basis of an analogue circuit of hydraulic resistances, where the hydraulic resistance of the node was divided into halves at the leaf insertion point. From measurements with Epipremnum aureum Bunt., Cucumis sativus L. and Zea mays L., it was indicated that hydraulic conductance of a leaf insertion was significantly lower than those of node and internode. Z. mays with the thickest stem had the highest hydraulic conductance of the internode. On the other hand, the stem-area specific, hydraulic conductances of node and internode were the highest in C. sativus with the thinnest stem and the large leaf.

Original languageEnglish
Pages (from-to)71-78
Number of pages8
JournalBiotronics
Volume29
Publication statusPublished - 2000

Fingerprint

internodes
Cucumis sativus
fluid mechanics
hydraulics
Pressure
Zea mays
leaves
plant organs
stem
stems
Epipremnum pinnatum
Water
flowmeters
leaf conductance
flowmeter
evaluation
water flow
organ

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)
  • Plant Science
  • Environmental Science(all)

Cite this

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title = "Methodological establishment for individual evaluations of hydraulic conductances of node, internode and leaf insertion in a nodal complex",
abstract = "A pressure flow meter system was newly developed for measuring hydraulic characteristics of plant organs. In the system, the pressurized water flow through plant organs was given at a desired rate by regulating the applied pressure, and hydraulic resistance or conductance of plant organs was determined from the flow rate and the applied pressure at intervals of about 5 minutes. By applying the system, individual evaluations of hydraulic characteristics of node, internode and leaf insertion in a nodal complex were performed on the basis of an analogue circuit of hydraulic resistances, where the hydraulic resistance of the node was divided into halves at the leaf insertion point. From measurements with Epipremnum aureum Bunt., Cucumis sativus L. and Zea mays L., it was indicated that hydraulic conductance of a leaf insertion was significantly lower than those of node and internode. Z. mays with the thickest stem had the highest hydraulic conductance of the internode. On the other hand, the stem-area specific, hydraulic conductances of node and internode were the highest in C. sativus with the thinnest stem and the large leaf.",
author = "K. Nagasuga and Daisuke Yasutake and T. Araki and Kitano Masaharu",
year = "2000",
language = "English",
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issn = "0289-0011",
publisher = "Kyushu University, Faculty of Science",

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TY - JOUR

T1 - Methodological establishment for individual evaluations of hydraulic conductances of node, internode and leaf insertion in a nodal complex

AU - Nagasuga, K.

AU - Yasutake, Daisuke

AU - Araki, T.

AU - Masaharu, Kitano

PY - 2000

Y1 - 2000

N2 - A pressure flow meter system was newly developed for measuring hydraulic characteristics of plant organs. In the system, the pressurized water flow through plant organs was given at a desired rate by regulating the applied pressure, and hydraulic resistance or conductance of plant organs was determined from the flow rate and the applied pressure at intervals of about 5 minutes. By applying the system, individual evaluations of hydraulic characteristics of node, internode and leaf insertion in a nodal complex were performed on the basis of an analogue circuit of hydraulic resistances, where the hydraulic resistance of the node was divided into halves at the leaf insertion point. From measurements with Epipremnum aureum Bunt., Cucumis sativus L. and Zea mays L., it was indicated that hydraulic conductance of a leaf insertion was significantly lower than those of node and internode. Z. mays with the thickest stem had the highest hydraulic conductance of the internode. On the other hand, the stem-area specific, hydraulic conductances of node and internode were the highest in C. sativus with the thinnest stem and the large leaf.

AB - A pressure flow meter system was newly developed for measuring hydraulic characteristics of plant organs. In the system, the pressurized water flow through plant organs was given at a desired rate by regulating the applied pressure, and hydraulic resistance or conductance of plant organs was determined from the flow rate and the applied pressure at intervals of about 5 minutes. By applying the system, individual evaluations of hydraulic characteristics of node, internode and leaf insertion in a nodal complex were performed on the basis of an analogue circuit of hydraulic resistances, where the hydraulic resistance of the node was divided into halves at the leaf insertion point. From measurements with Epipremnum aureum Bunt., Cucumis sativus L. and Zea mays L., it was indicated that hydraulic conductance of a leaf insertion was significantly lower than those of node and internode. Z. mays with the thickest stem had the highest hydraulic conductance of the internode. On the other hand, the stem-area specific, hydraulic conductances of node and internode were the highest in C. sativus with the thinnest stem and the large leaf.

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