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Impact of ultra-dry storage



Impact of ultra-dry storage on vigor capacity and antioxidant enzyme activities in seed of Ammopiptanthus mongolica

موضوع:  فعالیت های آنزیم های آنتی اکسیدان در دانه

زبان: انگلیسی

فرمت فایل: pdf

برای مشاهده خلاصه مقاله و دریافت مقاله به ادامه مطلب بروید.

Yi LI1'2'*, Jian-Jun QU1,2, Wei-Min ZHANG1,2, Li-Zhe AN3, Peng XU4, and Yong-Cai LI5
Chinese Academy of Sciences, Lanzhou Gansu, 730000, P.R. China
1Dunhuang Gobi and Desert Research Station, Cold and Arid Region Environmental and Engineering Research Institute,
Chinese Academy of Sciences, Lanzhou Gansu, 730000, P.R. China
2Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou Gansu, 730000, P.R. China
3School of Life Science, Lanzhou University, Lanzhou Gansu, 730000, P.R. China
4Pratacultural College, Gansu Agricultural University, Lanzhou Gansu, 730070, P.R. China
5College of Food Science and Engineering, Gansu Agricultural University, Lanzhou Gansu, 730070, P.R. China

(Received July 7, 2009; Accepted May 14, 2010)

ABSTRACT. This research was to determine whether ultra-drying improves the vigor and storability of Am­mopiptanthus mongolica seeds. Seeds of A. mongolica were dried to a 4.67%, 3.73%, and 2.24% moisture content (MC). After storage for 24 months, their level of vigor was measured. To determine whether these low MCs affect the activities of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), and glutathione reductase (GR), we evaluated the ability of dried seeds to germinate and to produce normal seedlings. Meanwhile, we also measured volatile aldehydes and malondial-dehyde (MDA), lipid peroxidation production. Results indicated that the SOD, CAT, POD, APX and GR activ ities of ultra-dry seeds were higher than those of control seeds while volatile aldehydes and MDA were lower than in the control. The drying tolerance was related to a reorientation of the enzymatic antioxidant defence system. The electrical conductivity of ultra-dry seeds and controls showed obvious differences. All the results showed that ultra-dry storage is beneficial to maintaining the vigor of A. mongolica seeds. It is proposed that A. mongolica seeds may be stored in an ultra-dry state at ambient temperature for a long time.

Keywords: Antioxidant defence system; Seed longevity; Seed storability.

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نویسنده:داود نبی زاده

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