ISSN:
1432-2048
Keywords:
Compartmentation
;
Ethylene
;
Phaseolus
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Isolated cotyledons of Phaseolus vulgaris L. cv. Canadian Wonder accumulated 14C2H4 (0.7–1 μl l-1) from air to give partition coefficients of 1 to 4, which greatly exceeded the value obtained with steam killed cotyledons (0.05) and with water (0.11). After 14C2H4 treatment, 98% of the 14C in the tissue remained as 14C2H4. The labelled ethylene accumulated by cotyledons was released only slowly (1–10% h-1) either in an air stream or into toluene. Heating to 60°C for 2 h, but not freezing and thawing, caused the immediate release of 14C2H4 from the tissue. Propylene and vinyl chloride competitively inhibited the accumulation of 14C2H4. Cotyledons emanated endogenous ethylene at a very low rate but after heating (although not freezing and thawing) 13 nl of ethylene per g fresh mass were released within minutes. It was concluded that french bean cotyledons hold ethylene in a compartmented form in sufficient amount to account for at least 200 h of emanation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00380130
Permalink
