Effects of Atmospheric Humidity on Abscisic Acid Accumulation and Water Status in Leaves of Rice (Oryza sativa L.)

Rice (Oryza sativa L ) plants were grown in controlled environment cabinets with either low (c 0 4 kPa) or high (c 1 6 kPa) atmospheric water vapour pressure deficit (v p d) The capacity of detached leaves to accumulate ABA in response to rapidly induced water stress was increased when plants were g...

Full description

Saved in:
Bibliographic Details
Published in:Annals of botany 1984-10, Vol.54 (4), p.569-582
Main Author: HENSON, I. E.
Format: Article
Language:English
Subjects:
abscisic acid
Atmospherics
Dehydration
Gramineae
Humidity
leaf water relations
Leaves
Oryza sativa L
Plant water relations
Plants
Rice
Solutes
Transpiration
Turgor pressure
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Rice (Oryza sativa L ) plants were grown in controlled environment cabinets with either low (c 0 4 kPa) or high (c 1 6 kPa) atmospheric water vapour pressure deficit (v p d) The capacity of detached leaves to accumulate ABA in response to rapidly induced water stress was increased when plants were grown at high v p d High v p d significantly lowered solute potential (ψ2) without reducing total water potential (ψ) Hence, plants grown at high v p d had a higher leaf turgor potential (ψp) The treatment employed to induce ABA accumulation (a 10 per cent reduction in fresh weight), reduced ψp to zero in all leaves Hence, the total change in ψp (Δψp) was greater for leaves grown at high v p d Short-term (24–48 h) exposure to changed v p d was shown to be effective in altering both leaf water status and subsequent ABA accumulation Correlations between ABA accumulation and Δψp were demonstrated Links between humidity, transpiration flux, leaf water status and water stress-induced ABA accumulation, are described and discussed
ISSN:0305-7364
1095-8290
DOI:10.1093/oxfordjournals.aob.a086827