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WATER RELATIONS AND OXYGEN UPTAKE BY TWO LINES OF CORN DIFFERING IN STORAGE PERFORMANCE

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Differences in seed aging susceptibility among cultivars of the same species can be used to study the underlying physiological basis of the deterioration processes. Respiratory oxygen uptake might be an indicator of seed storage performance, which could be used to monitor these deterioration processes. The minimum moisture content at which oxygen uptake occurred was the same (15–20%) in the seeds of two lines of corn (Zea mays L.) differing in storage performance, when equilibrated at different relative humidities. However, the rate of increase in oxygen uptake as a function of the water content of the cultivar with poor storage properties was lower and the respiration rate showed greater scatter than in the cultivar with good keeping qualities. The differences in storage performance apparently cannot be ascribed either to the water relations or to the water content at which oxygen uptake begins. These results are discussed in relation to other possible causes for poor storage performance.

Affiliations: 1: Boyce Thompson Institute for Plant Research and the Agronomy Department, Cornell University ; 2: Department of Botany, The Hebrew University of Jerusalem

10.1080/0021213X.1990.10677159
/content/journals/10.1080/0021213x.1990.10677159
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/content/journals/10.1080/0021213x.1990.10677159
1990-05-13
2018-09-24

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