INTERACTION EFFECTS OF BENZYLADENINE AND/OR PIX ON SOYBEAN PLANT: 1. SOME MORPHOLOGICAL AND PHYSIOLOGICAL RESPONSES | ||||
| Journal of Plant Production | ||||
| Article 12, Volume 30, Issue 10, October 2005, Page 5941-5958 PDF (5.62 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2005.237521 | ||||
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| Authors | ||||
| Amany A. Ramadan,1; H. A.M. Mostafa1; H. M.M. Abd EI-Dayem2; Mervat S.H. Gad1 | ||||
| 1Botany Department, National Research Center, Dokki, Giza, Egypt. | ||||
| 2Agricultural Botany Dept., Fac. of Agric. Moshtohor, Banha branch, Zagazig Univ. | ||||
| Abstract | ||||
| Two pot experiments were carried out in the green house of Botany Department, National Research Centre, Dokki, Giza, Egypt, during two successive seasons (2000 and 2001). The aim of the present work was to study the effect of foliar application with benzyladenine, BA (25, 50 and 100 ppm), Pix (25, 50 and 100 ppm) and the interaction between BA and Pix on morphological and chemical analysis of soybean shoots (photosynthetic pigments, carbohydrate, protein and endogenous phytohormones ). The results revealed that foliar application with BA and/or Pix at all doses increased significantly the morphological criteria of shoot (Shoot length, stem diameter, fresh and dry weight, number of branches, number of leaves and leaves area/plant) and roots parameters (Root length and fresh & dry weights) at vegetative, flowering and fruiting stages. The most potent effect was observed due to the interaction treatment than the use of each growth regulator solely. The maximum promotive effect induced in all morphological growth was detected, in general, at 50 ppm BA + 50 ppm Pix at all stages of plant growth. The data also revealed that the photosynthetic pigments (chlorophylls and carotenoids) of soybean leaves significantly increased as affected by BA and/or Pix treatments. The most pronounced increase in photosynthetic pigments content was accompanied by the increase in total soluble sugar, polysaccharides and consequently total carbohydrates in soybean shoots in response to all treatments. In the mean time, the amino-N, total soluble-N, protein-N and total-N increased in treated soybean plant's shoots in response to all concentrations of BA and/or Pix as compared to the untreated plants. The interaction treatments induced the maxinum values of nitrogenous content as compared with the use of each growth regulator individually. 8enzyladenine treatments decreased ABA and increased 1M contents, while a reverse effect was cbserved in response to all Pix concentrations. The endogenous GAJ and total cytokinins showed marked increases in response to all BA and/or Pix treatments. | ||||
| Keywords | ||||
| Soybean; benzyladenine (BA); pix; interaction; morphology; pigments; carbohyC:rate; protein and hormones | ||||
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