EFFECT OF HOUSE GREEN, GIBBERELLIC ACID (GAG) AND ANTITRANSPIRANT ON GROWTH AND SOME CHEMICAL CONSTITUENTS IN POMEGRANATE AND BETULAEFOLIA PEAR PLANTS GROWN UNDER SALINE CONDITIONS | ||||
| Journal of Plant Production | ||||
| Article 11, Volume 31, Issue 11, November 2006, Page 7267-7285 PDF (5.79 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2006.236388 | ||||
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| Authors | ||||
| Malaka S.M. Naiema,1; Eman E.K. Abd Ella1; Nagwa A.E. Abd-El-Meged2 | ||||
| 1Hort. Res. Station, Sabahia, Alex., Hort. Res. Ins., A. R. C., Egypt. | ||||
| 2Hort. Res. Station, Nubaria, Alex. Hort. Res. Ins., A. R. C.,Egypt. | ||||
| Abstract | ||||
| This investigation was carried out during 2005 and 2006 seasons on pomegranate and Pyrus betulaefolia rootstock plants to study the effect of House Green, gibberellic acid and Paraffin oil as an antitranspirant in reducing salinity hazards on growth rate, total leaf area. trunk cross-sectional area and total dry weight. In addition, the effect of the different treatments on leaf and root mineral compositions (N, P, K, Na and Cl), total chlorophyll content, total leaf carbohydrate and leaf total free amino acids was determined. The results could be summarized as follows: 1. Raising the salinity level of the irrigation solution from zero to either 1000 ppm or 2000 ppm NaCl caused a reduction in the plant growth rate, leaf area, total dry weight, trunk cross~sectional area, total leaf chlorophyll content and leaf total carbohydrates. While, increased total free amino acids in the leaf tissues of two fruits species. This influence was more pronounced in plants grown under the 2000 ppm NaCl salinity level 2.The growth rate,leaf area. trunk cross-sectional area,total dry weight, total leaf chlorophyll content and total leaf carbohydrates of the experimental plants were positively influenced by the application of House Green (soil applications ) gibberellic acid or paraffin oil as an antitranspirant treatments yet, the inverse relationship was noticed with regards to the leaf total free amino acids content . 3.8lgnificant positive interactions were generally noticed between either or both salinity levels and the other treatments except House Green (foliar sprays) on the growth rate. leaf area, trunk cross-sectional area, total dry weight, total leaf chlorophyll content and leaf total carbohydrates of the experimental plants. 4. Negative interaction reactions were noticed between either or both salinity levels and the different experimental treatments on the total amino acids content. 5. The influence of salinity on the concentration of the different nutrients was negative, in most cases, except for leaf and root sodium and chloride content, as they markedly increased with increasing the salinity level of the irrigation water. 6. Most of the significant influences of the different treatments on the leaf and root mineral composition were positive in most cases. 7. The statistical interactions between salinity levels and the other treatments on the leaf and root mineral composition were positive in most cases. 8.Some of the House Green, gibberellic acid or antitranspirant treatments retarded the appearance symptoms of harmful of Pyrus betulaefolia rootstock plants. ie. when the plants were irrigated with the highest saline concentration (2000 ppm NaCl ), the symptoms of chlorosis appeared after 95 days in 2005 and 113 days in 2006 . | ||||
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