American Journal of Plant Sciences (AJPS )
American Journal of Plant Sciences is a peer reviewed international journal dedicated to the latest advancement of plant science. The goal of this journal is to keep a record of the state-of-the-art research and to promote study, research and improvement within its various specialties. All manuscripts submitted to AJPS must be previously unpublished and may not be considered for publication elsewhere at any time during JPS's review period. Additionally, accepted ones will immediately appear online followed by printed in hard copy.
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Scientific Research Publishing
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ABSTRACT: Kola (Cola nitida) is an important economic cash crop for many West and Central African countries. It has several medicinal uses in the pharmaceutical industries and also plays a major role in traditional marriages among Islamic communities across West and Central Africa. The crop is extensively cultivated in Nigeria and Ghana. However, it exhibit signs of total and partial sterility as well as self incompatibility when propagated from seeds in most cases. Therefore, grafting is seen as a method of choice in addressing the problem stated above. Though grafting accounts for some degree of success, there is the need to assess genotypic and physiological factors that account for high or low grafting success. Genetic and physiological factors (such as rootstock age) affecting grafting success and growth in kola (C. nitida) were investigated in two separate experiments. In experiment I720 kola seedlings were raised from unselected kola nuts and sown at two monthly intervals. Four groups of seedlings (180/group) i.e. 6, 8, 10 and 12 months old were thus produced. Three different scions (A1, A12 and JB1) measuring (5 - 10 cm) were grafted onto the four age groups of rootstocks, namely, 6, 8, 10 and 12 months. Experiment II consisted of 540 seedlings raised from three main crosses (JX1/9 × JX1/11 * B1/142 × B1/151, JX1/9 × JX1/11 * B2/177 × B2/156 and JX1/9 × JX1/11 * GX1/46 × GX1/53). Grafting was done after six months using the same set of scions as described in experiment I. Experimental design used was 3 × 4 and 3 × 3 factorial designs in completely randomised design with three replicates for experiment I and II respectively. The fixed effects were the different genotype and age of rootstock at grafting whilst the response variable was the percentage of successful grafting two months as well as growth at six monthly intervals. Results from the study showed that grafting onto 6 months old stocks gave the highest percentage success and growth of grafts followed by 8, 10 and 12 months old rootstock in that order in both trial years. The study revealed also a significant rootstock and scion interaction (P < 0.05). We conclude that successful grafting in kola depends on rootstock genotype such as JX1/9 × JX1/11 * GX1/46 × GX1/53 and has been proven suitable for use in future kola propagation studies. Nonetheless, suitable rootstock with high grafting success does not translate into vigorous scion growth.American Journal of Plant Sciences 12/2014; 5(26):3873-3879.
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ABSTRACT: Compared to normal, diabetic skin is characterized by great sensitivity. Oxidative stress is directly involved, contributing in accelerated skin aging, xerodermia and poor wound healing. In the last 10 years, cigarette smoke (CS) exposure has been associated with several skin and dermatological conditions and is directly related to the oxidative stress affecting the skin. However, limited data exist concerning the effect of CS on diabetic skin. It was hereby studied some of the effects of cigarette smoke exposure on the skin of hairless dia-betic mice and the potential skin protection by topical applications of Pinus halepensis bark extract was investigated. Female hairless SKH-2 diabetic mice were exposed for 8 days to tobacco smoke and topical applications were performed twice daily. Biophysical parameters such as transepidermal water loss (TEWL), skin elasticity and erythema were measured. In addition, the oxidative stress was evaluated. The results show that diabetes and CS have a synergistic negative action on skin condition, with the development of xerosis and high ROS levels whilst topical applications of Pinus halepensis bark extract protect efficiently of the toxic effect of CS on skin, by decreasing skin dryness, oxidative stress and blood glucose levels.American Journal of Plant Sciences 12/2014; 5:3964-3973.
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