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Effect of ultradrying on
germination and physiological and biochemical
characteristics of Haloxylon persicum
Tong Li-rong1,2 and Han Jian-guo1*
1Department
of Grassland Science, College of Animal Science and
Technology, China Agricultural University, Beijing 100193,
China.
2College
of Animal Science and Technology, Shanxi Agricultural
University, Taigu, Shanxi Province 030801, China.
*Corresponding author. E-mail:
jianguohan2058@126.com. Phone: 86-10-62734746; Fax:
86-10-62731264.
Accepted
20 December, 2008 |
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This study was to determine whether the vigor of the
Haloxylon persicum seeds can be maintained at a higher
level and their storage characteristics can be improved by
ultra-dry storage. Moisture content of H. persicum
seeds was dried to 7.62, 6.73, 5.23, 4.24, 3.24 and 1.02% in
a desiccating container with silica gel, and stored at 25, 4
and -20°C for 12 months. The results showed that the H.
persicum seeds became more tolerant to aging condition
if they could be dried to below 3.24% of moisture content.
Under the same aging condition, the germination of seeds
with 3.24% of moisture content decreased greatly, while that
of ultra-dry seeds still kept a high level. The
dehydrogenase activity of ultra-dry seeds was higher than
that of the control (moisture content 3.24%, aging
treatment). The results indicated that dehydrogenase,
guaiacol peroxidase (POD), superoxide dismutase (SOD) and
catalase (CAT) activities of the ultra-dry seeds were higher
than those of the control seeds. The results demonstrated
that an appropriate ultradried H. persicum seeds
could persist and ultradrying treatment was an ideal method
of seed storage.
Key
words:
Seeds of
Haloxylon persicum, ultra-dry storage, germination,
physiological characteristics. |
