Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Primary events regulating stem growth at low water potentials.

H Nonami1, J S Boyer

  • 1College of Marine Studies, University of Delaware, Lewes, Delaware 19958.

Plant Physiology
|August 1, 1990
PubMed
Summary

Inadequate water inhibits soybean seedling growth by first reducing the water potential gradient, followed by decreased cell wall extensibility and water conductance. Turgor pressure remained stable throughout the process.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A Percutaneous Technique for Reduction and Internal Fixation of Displaced Intra-Articular Calcaneal Fractures.

JBJS essential surgical techniques·2021
Same author

Desorption of low-volatility compounds induced by dynamic friction between microdroplets and an ultrasonically vibrating blade.

The Analyst·2016
Same author

Electrospray droplet impact secondary ion mass spectrometry using a vacuum electrospray source.

Rapid communications in mass spectrometry : RCM·2015
Same author

Sensitivity of cell division and cell elongation to low water potentials in soybean hypocotyls.

Planta·2014
Same author

Water transport in plants: Mechanism of apparent changes in resistance during absorption.

Planta·2014
Same author

Structure and activity of chloroplasts of sunflower leaves having various water potentials.

Planta·2014

Area of Science:

  • Plant Physiology
  • Cell Biology
  • Biophysics

Background:

  • Cell enlargement is crucial for plant growth and is highly dependent on water availability.
  • Understanding the physical parameters that regulate cell enlargement under water stress is essential for plant science.

Purpose of the Study:

  • To identify the primary physical parameter affected first during water-deficit-induced inhibition of cell enlargement in soybean seedlings.
  • To elucidate the sequence of changes in physical parameters regulating cell enlargement under water stress.

Main Methods:

  • Measurements of osmotic potential, turgor, yield threshold turgor, growth-induced water potential, wall extensibility, and conductance to water in soybean seedlings.
  • Simultaneous monitoring of these parameters using a guillotine psychrometer after inducing water stress by transplanting to low-water-content vermiculite.

Related Experiment Videos

Main Results:

  • A decrease in the gradient of water potential from the xylem to enlarging cells (growth-induced water potential) was the first parameter to limit growth.
  • This was followed by reduced cell wall extensibility and tissue conductance for water after 5-10 hours.
  • Turgor pressure did not significantly change, and osmotic adjustment led to a later recovery of growth-induced water potential.

Conclusions:

  • The initial event in growth inhibition by water deficit is a change in growth-induced water potential.
  • This initial change may trigger subsequent metabolic alterations affecting cell wall and membrane properties, leading to reduced extensibility and conductance.
  • Plant growth regulation under water stress involves a complex interplay of water potential gradients and cell wall properties.