Anaerobiosis and Carbohydrate Status of the Embryonic Axis of Germinating Cucumber Seeds

in HortScience
Authors:
David Mason PharrDepartment of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609

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Yoshie MotomuraDepartment of Horticultural Science, North Carolina State University, Raleigh, NC 27695-7609

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Abstract

The effect of anaerobiosis, imposed during germination of ‘Calypso’ cucumber (Cucumis sativas L.) seeds, was studied. Anaerobic conditions inhibited reserve mobilization from the cotyledons and dry weight gain by the embryonic axis. Within the embryonic axis, lipid degradation was stopped and use of all readily metabolizable carbohydrate reserves was strongly stimulated. By 48 hr of exposure to an anaerobic environment, the axis was nearly depleted of endogenous carbohydrate reserves. Aerobically germinating seeds accumulated a massive concentration of hexose sugars within the axis during the same time period. Thus, growth inhibition within cucumber seeds during anaerobiosis may result in part from carbohydrate deprivation of the embryonic axis.

Contributor Notes

Professor.

Visiting Scientist. Permanent address: Tohoku Univ., Sendi, Japan.

Received for publication 29 Jan. 1988. Paper no. 11399 of the Journal Series of the North Carolina Agricultural Research Service, Raleigh, NC 27695-7601. Mention of trademark or proprietary product does not constitute a guarantee or warranty of the product by the NCARS nor does it imply approval to the exclusion of other products that may be suitable. We thank the Ministry of Education of Japan for financial support of Y.M. during her visit. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.

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