Volatile losses of sulfur by intact alfalfa plants

Grundon N.J. and Asher C.J. (1986) Volatile losses of sulfur by intact alfalfa plants. Journal of Plant Nutrition, 9 12: 1519-1532. doi:10.1080/01904168609363546


Author Grundon N.J.
Asher C.J.
Title Volatile losses of sulfur by intact alfalfa plants
Journal name Journal of Plant Nutrition   Check publisher's open access policy
ISSN 1532-4087
Publication date 1986-12-01
Sub-type Article (original research)
DOI 10.1080/01904168609363546
Volume 9
Issue 12
Start page 1519
End page 1532
Total pages 14
Subject 1102 Cardiovascular Medicine and Haematology
1314 Physiology
Abstract An apparatus was developed for the quantitative collection of volatile sulfur compounds released by intact plants and was used to study the effects of leaf temperature and stomatal aperture on the amount and pattern of release. An air stream sweeps volatiles released by the plants through a water-cooled condenser system in which the air is dried prior to trapping the volatile sulfur compounds on activated carbon. Tests with 35S-labelled 1-butanethiol gave a mean recovery of 95.8 ± 4.3%. The yield of volatile sulfur compounds increased greatly when air flow rate increased from 1 to 2 1 min−1, but was independent of flow rate over the range 2 to 6 1 min−1. About 93% of the trapped activity originated from plant shoots, about 1% from stem bases and roots and about 4% from culture solutions. Release of volatile sulfur compounds from intact plants followed a diurnal pattern, maximum rates occurring around midday and minimum rates overnight. Maximum rates of release ranged from 30 to 41 ng S g dry weight of shoots−1 2 hr−1, while minimum rates ranged from 1.5 to 2.1 ng S g dry weight of shoots−1 2hr−1. Leaf temperature rather than stomatal aperture seemed to be the major factor controlling rate of release of volatile sulfur compounds. The rate of release was almost doubled by an increase of 7–9°C in leaf temperature.
Keyword alfalfa
diurnal pattern
intact plants
lucerne
shading
sulfur
temperature
Volatile losses
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 14 Jun 2016, 05:37:16 EST by System User