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Effects of Uniconazole on the Stage Bulbil of Drought-tolerant Characteristics of Pinellia Ternate(Thunb.)Breit

Author: ChengShiMing
Tutor: WenTao
School: Sichuan Agricultural University
Course: Crop Cultivation and Farming System
Keywords: Uniconazole Pinellia Drought Stress Hormone Enzyme activity
CLC: S567.239
Type: Master's thesis
Year: 2010
Downloads: 57
Quote: 1
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Abstract


Pinellia Pinellia ternata (Thunb.) BEFIT Araceae perennial herb to tubers medicine, traditional Chinese herbal medicines. In this experiment, Pinellia materials, A pot method, by measuring the Pinellia bulbil of leaf morphology, degree of injury, protection Enzyme System and hormone content and other indicators of the dynamics, research the different concentrations Uniconazole yl (S3307) Soaking under of Pinellia bulbil Leaves morphological and physiological effects of natural drought stress. The test results are as follows: 1. Uniconazole having significantly improved morphological characteristics. Under natural drought stress, with different concentrations of uniconazole soaking treatment to make the Pinellia height was significantly lower, the most obvious of which 40mg / L treatment effect, the bulbils period was reduced by 41.7%; improve Pinellia leaf area , reducing the the Pinellia non-physiological pour seedling rate in the the natural drought medium-term (9d-12d), 10mg / L treatment down the lowest rate of seedlings were lower than the control 21.4% and 30.0%. 2 Uniconazole Pinellia cell membrane protection. Different concentrations of cell membrane treated with uniconazole the Pinellia bulbil Leaves under Drought Stress, by the degree of injury were lower than the control treatment. With the severity of natural drought stress, the cell membrane by the degree of injury is more serious. Relative conductivity and MDA content expressed in 10 mg / L treatment reduced the most, 16.6% and 33.5% respectively compared with the control. Under Drought Stress the different concentrations Uniconazole processing are improved Pinellia relative chlorophyll content. But at low concentrations (0-10mg / L) range, with the increase of the concentration of uniconazole relative chlorophyll content increased; in the high concentration range (20-40mg / L), the relative chlorophyll content with the concentration of uniconazole the increase of amplitude is reduced. 4. Uniconazole help to improve the protective enzyme system activity. Under Drought Stress the different concentrations Uniconazole processing can significantly improve the Pinellia bulbil of leaves of SOD, POD and CAT activity, with the intensification of the natural drought stress, enzyme activity increased downward trend. Natural drought stress in the medium-term (10d-12d) maximum activity increased amplitude, which deal with the highest activity of 10mg / L, compared with the control, respectively, an average of 33.8%, 186.6% and 28%, respectively. 5. Uniconazole the adjust the the Pinellia blade source hormone. Natural drought stress, the different concentrations Uniconazole make the Pinellia bulbils of leaf ABA content increases, an increase of 28.4% compared with the control; IAA content and IAA / ABA ratio decreased, reduced by an average of 23.4% and 45.8, respectively, compared with the control %. That natural drought stress under different concentrations ene ene Uniconazole the treatment promote Pinellia bulbil period leaves ABA biosynthesis, suppression the Pinellia leaves IAA synthesis.

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