THE PHYSIOLOGICAL RESPONSE OF COTTON PLANT TO FOLIAR APPLICATION WITH THE GROWTH REGULATOR AMCOTONE | ||||
| Journal of Plant Production | ||||
| Article 2, Volume 29, Issue 2, February 2004, Page 527-534 PDF (1.33 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238504 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| M. M. A. Kassem, | ||||
| Cotton Research Institute Agric. Res. Center, Giza, Egypt. | ||||
| Abstract | ||||
| Two field experiments were carried out at lJ1allawi Agric. Res. Station, Minia Governorate, in 2002 and 2003 seasons to study the response of Giza 83 cotton cultivar to foliar application of the growth regulator Amcotone which contains 1- naphthyl acetic acid (NAA) and 1-naphthyl acetamide (NAAM). Besides the control treatments, Amcotone was used at the rates of 1.(1, 1.2 and 1.4 g/l. applied once at the beginning of flowering stage (BF) or twice at SF and 15 days later. Results of this study reveal that some treatments of Amcotone exhibited significant increases in leaves content of chlorophyll 3, total chlorophyll, poly phenols, total phenols, number of open bolls/plant and seed cotton yield/fad. However, it exerted a significant reduction in leaves content cf reducing sugars, total soluble sugars, number of aborted fruiting sites/plant and bud and boll shedding%. The application of Arncotone had no significant effect on plant growth characters. number of sympodia/plant. total fruiting sites/plant, number c f unopen bolls/plant, boll weight, earliness%, lint% or seed index in both seasons. The application of Amcotone at the rate of 1.2 gil. either one or two times of application produced the highest seed cotton yielc and gave the best results in general during the two studied seasons. It could be concluded that spraying cotton plants with the growth regulator Amcotone exerted some biochemical and physiotoqical effects which reduced bud and boll shedding and increased boll retention and yield production | ||||
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