Water-Transport System and Its Components in Higher Plants: 5. Dynamic Model of the Water-Transport System in Transpiring Plants

Water-Transport System and Its Components in Higher Plants: 5. Dynamic Model of the... The dynamic model of aperture behavior in leaf stomata of intact transpiring plants under constant environmental conditions is considered. The model is based on the supposed existence of feed-forward relations in the water-transport system: the decrease in root resistance – reduction in the capillary tension in the leaf apoplast – enlargement of the stomatal aperture. In parallel, there is a positive feedback relation: enlargement of the stomatal aperture – enhancement of transpiration – increase in the viscous flow through the root – intensified supply of dissolved oxygen to the respiratory centers of the root symplasm – elevation of turgor and the decrease in root resistance. Under the fulfillment of nonstringent physical requirementship, this system is capable of generating auto-oscillations with a period of 20–80 min. The model describes the relationship between the frequency–amplitude characteristics of auto-oscillations and the main parameters of the water-transport system in plants. In particular, the model presents a clue to one of the most intriguing phenomenon: the moistening of the root environment increases the frequency of auto-oscillations in some cases and reduces this frequency in others. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Water-Transport System and Its Components in Higher Plants: 5. Dynamic Model of the Water-Transport System in Transpiring Plants

Loading next page...
 
/lp/springer_journal/water-transport-system-and-its-components-in-higher-plants-5-dynamic-7utFOR03X6
Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2000 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1026623615570
Publisher site
See Article on Publisher Site

Abstract

The dynamic model of aperture behavior in leaf stomata of intact transpiring plants under constant environmental conditions is considered. The model is based on the supposed existence of feed-forward relations in the water-transport system: the decrease in root resistance – reduction in the capillary tension in the leaf apoplast – enlargement of the stomatal aperture. In parallel, there is a positive feedback relation: enlargement of the stomatal aperture – enhancement of transpiration – increase in the viscous flow through the root – intensified supply of dissolved oxygen to the respiratory centers of the root symplasm – elevation of turgor and the decrease in root resistance. Under the fulfillment of nonstringent physical requirementship, this system is capable of generating auto-oscillations with a period of 20–80 min. The model describes the relationship between the frequency–amplitude characteristics of auto-oscillations and the main parameters of the water-transport system in plants. In particular, the model presents a clue to one of the most intriguing phenomenon: the moistening of the root environment increases the frequency of auto-oscillations in some cases and reduces this frequency in others.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 8, 2004

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off