期刊
THERMOCHIMICA ACTA
卷 579, 期 -, 页码 45-49出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tca.2014.01.014
关键词
Isothermal calorimetry; Glycine max; Seed germination; Physiological quality
资金
- CONICET
- CIUNT
Seeds of soybean, cv. DM5.8RR of two different physiological qualities were germinated and monitored by isothermal calorimetry and imbibition methods. Also, seeds stored at 25 degrees C under different vapor pressures were analyzed. Results showed that those seeds with lower physiological quality, lot 1 (germination power of 62%) had a much higher speed of water uptake than seeds with a germination power of 93%, lot 3. Thus, endothermic peaks could be observed in the specific thermal power time curves of germination of seeds of lot 1 which were related to anoxia. Seeds of lot 3 with different initial water content, iWC, showed three phases of imbibition where the third also involved metabolism. Apparently, when the enthalpy change value of water-seed interaction of the three phases is similar, roots protrude with vigor. Such was the case for soybean seeds with 0.084 and 0.101 gg(-1) iWC. (C) 2014 Elsevier B.V. All rights reserved.
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