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Study on Salt-alkali Tolerant of Rosa Rugosa

Author: YangZhiYing
Tutor: ZhaoLanYong
School: Shandong Agricultural University
Course: Ornamental Plants and Horticulture
Keywords: Rose Neutral salt Alkaline salts
CLC: S685.12
Type: Master's thesis
Year: 2011
Downloads: 91
Quote: 1
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Abstract


In this paper, as test materials to cutting seedlings and seeds of wild rose and cultivated roses year by the seedling pot experiment and seed germination test, study rose in neutral salts and alkaline salt stress germination, growth and changes in physiological and biochemical characteristics discussed Rose salinity stress reaction, the main conclusions are as follows: neutral salt stress inhibits Rose seed germination, germination rate, germination potential, germination index, vigor index showed a downward trend. The decline of wild roses degree less than the varieties 'Ziyan'. With the increase in salt concentration rose seed SOD activity was a downward trend after the first rise, the rise of the wild rose more than 'Ziyan'. Neutral salt stress conditions, as the salt concentration increases, rose leaf soluble sugar content, proline content showed an upward trend, with the extension of stress time was increased and then decreased trend in the third week maximum. Alkaline salt stress conditions, an upward trend. Rose leaves under salt stress SOD activity were increased and then decreased to trend With the increase of salt concentration and pH in the neutral salt stress conditions, showed the highest activity in the salt concentration of 0.2%, with the stress time prolonged SOD activity decreased, the antioxidant capacity recession. Alkaline salt stress conditions, the pH of 8.01 when the highest SOD activity. After 4 weeks of salt stress, the leaves of Rose in K in content and root vigor With the increase of salt concentration and pH value showed a declining trend the Na contents increased, Na / K decline. Under salt stress, the total chlorophyll content, chlorophyll a, chlorophyll b content, net photosynthetic rate, transpiration rate, stomatal conductance with the increase in salt concentration and pH value and time extension showed a downward trend, the decline of wild roses to a lesser extent in 'Ziyan'. Intercellular CO 2 concentration is not obvious, Description Rose photosynthetic rate, reduce the mainly non-stomatal limitation caused. Salt stress inhibited the growth of the rose, so the decline in biomass, wild roses by the degree of inhibition of neutral salt stress conditions less than the cultivation of roses, 'Ziyan' less than the 'purple sticks' and 'Section II', and the root than the aboveground sensitive; alkaline salt stress conditions 'Ziyan' by the degree of inhibition greater than 'Purple Branch' and 'Zi Yan' roots are more sensitive to pH changes. Consolidated results of the above analysis, the neutral salt stress, wild rose cutting seedlings of annual variations in physiological parameters except SOD activity was less than the cultivation of roses, 'Ziyan' less than 'Purple Branch' and 'in Section 2 No. ' Alkaline salt stress, change 'Ziyan' greater than 'Purple Branch' Morphology and growth analysis of physiological indicators can draw the following conclusions: the salt tolerance of the roses in the neutral salt stress: wild roses gt; 'Ziyan' gt; the 'Purple branch', 'Section II' alkaline salt The rose salt tolerance Stress: 'Purple Branch' gt; 'Ziyan' correlation analysis results show that: the neutral salt stress, and other indicators in addition to SOD and biomass were significantly or very significantly correlated can be as Rose salt tolerance performance evaluation. Alkaline salt stress in addition to the content of the activity of SOD and K Rose alkali resistance can be used as evaluation. Neutral salts and alkaline salt stress, there are varying degrees of correlation between the physiological indicators. The principal component analysis showed that: the first principal component is Na , soluble sugar, the second principal component K , the third principal component is TTC.

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CLC: > Agricultural Sciences > Gardening > Ornamental Horticulture ( flowers and ornamental trees) > Flower trees in class > Rose,Rose,Rose
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