∗ Corresponding author Root cultures of Plumbago rosea Linn. were established from young leaf explants on solid Gamborg's B5 (B5) medium supplemented with the combination of αnaphthalene acetic acid (NAA) and kinetin in the concentration ranges of 0.5-2.0 mg/l and 0.1-0.5 mg/l, respectively. The production of plumbagin, determined by TLC-densitometry was higher [0.016 ± 0.0030% dry weight (DW)]...

Polar transport of kinetin-8-(14)C occurred in segments of petioles, hypocotyls, and roots of radish (Raphanus sativus L.). The polarity was basipetal in petioles and hypocotyls and acropetal in roots. In segments excised from seedlings with fully expanded cotyledons, indole-3-acetic acid was required for polarity to develop. In hypocotyl segments isolated at this stage, basipetal and acropetal...

The current study envisages producing Cordyline plants on a large scale employing costeffective In vitro protocols. The effect of various concentrations and types of plant growth regulators were observed to optimize the efficient media for propagation. Axillary buds excised from the greenhouse grown mother plants of Cordyline terminalis were cultured on MS medium supplemented with BAP (1.0-2.0 ...

Nghiên cứu được thực hiện nhằm tìm ra nồng độ các chất điều hòa sinh trưởng (BA, Kinetin, IBA và NAA) thích hợp cho quá trình tái chồi, nhân chồi tạo rễ in vitro của dưa lưới từ tử diệp. Thí nghiệm tại Phòng nuôi cấy mô trường Nông nghiệp, Đại học Cần Thơ. gồm 3 thí bố trí theo thể thức hoàn toàn ngẫu nhiên 2 tố trực tiếp diệp, cây lưới. Kết quả thấy diệp ở vùng gần phôi (3 ngày sau khi gieo) t...

TO THE EDITOR Ubiquinone (Coenzyme Q10) is an important lipophilic antioxidant synthesized by the body and critical for protection of mitochondrial membranes (Crane, 2001; Dallner and Sindelar, 2000). Idebenone is a synthetic derivative of ubiquinone with a shorter carbon side chain and subsequent increased solubility (Wieland et al., 1995). Both have been suggested as topical antioxidant ingre...

Chlorophyll levels in l-cm sections of the youngest fully expanded leaves of normal (Y) Festuca pratensis L. declined almost to zero over a period of 6 days after excision. Chlorophyll in a mutant genotype (NY) remained near the initial level for the whole of this period. Abscisic acid promoted pigment loss in Y but had no significant effect on chlorophyll in NY. Kinetin retarded pigment loss i...

The growth regulator abscisic acid (ABA) can be used to induce dormant bud structures (turions) in the duckweed Spirodela polyrrhiza L. In this paper we show that during this process, ABA rapidly induces elevated levels of mRNA transcripts encoding a novel basic peroxidase. In addition, we show that in the presence of the cytokinin kinetin the maintained increase is attenuated. Kinetin not only...

Suaeda fruticosa (L.) Forssk plants grown in saline conditions (200 to 400 mol m!3 NaCl) had greater fresh and dry weights than those grown in non-saline controls, and 600 to 1000 mol m!3 NaCl inhibited growth. Gibberellic acid and kinetin both alleviated some of the inhibitory effects of salinity at 800 mol m!3 NaCl on shoot growth of S. fruticosa while root growth was promoted by kinetin. Tis...

The effect of plant growth hormones (kinetin, gibberellic acid (GA3) and indole acetic acid (IAA)) on EMS-induced mutant wing spots was studied with the somatic mutation and recombination test (SMART) in Drosophila melanogaster. GA3 reduced all kinds of EMS-induced spot. While a 10 -3 M concentration of kinetin reduced only the number of EMS-induced twin spots, a 10-4 M concentration was seen t...

The effect of 100 ppm solution of each of kinetin, adenine, uracil and thymine on the vegetative and reproductive growth of Cucumis sativus, phaseolus mungo, Oryza sativus, Raphanus sativus and Lycopersicum esculentum plants were studied. The rate of vegetative growth was found to be more in the Cucumis sativus, Raphanus sativus and Lycopersicum esculentum plants treated with all the chemicals ...