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In the present investigation, in vitro tuberization, pre treatments for improvement of seed germination, potting media for seedling establishment and influence of growth regulators on sprouting of tubers were studied. In the in vitro techniques, tuber node was used as explant for the micro tuber formation. Explants sterilized with 70% ethanol for 30 seconds and HgCl2 for 60 sec reduced the contamination percentage (8.00%). MS medium supplemented with 4.0 mgl-1 BAP and 1.0 mgl-1 NAA recorded the highest response for primary tuber (100 %) and secondary tuber (100 %) formation. Minimum number of days for primary (19.88 days) and secondary tuber (45.11 days) formation was recorded in the medium supplemented with 4.0 mgl-1 BAP and 1.0 mgl-1 NAA. This also recorded the maximum number of tuber (1.77) from single explant. GA3 (1.0 mgl-1) was observed to be vital for the elongation of shoot where as IAA (1.0 mgl-1) in combination with IBA was effective for induction of roots on MS medium. Seed germination is erratic due to the presence of hard seed coat and hence germination is very poor. The studies on seed treatments revealed that, pre treating the seeds with hot water for an hour improved the germination (34.88%) and also resulted in earlier germination (48.35 days) of seeds. With reference to different media, the combination of sand, soil, cocopeat (2:2:1) recorded better seed germination and early germination and was very effective for micro tuber development. At 150 days after sowing, this medium gave the maximum length of the micro tuber (2.84 cm), fresh weight (1.76 g) and dry weight (1.25 g) of the micro tuber while sand:soil:FYM recorded the maximum girth of the micro tuber (3.29 cm). Tubers treated with different growth regulators to enhance the sprouting, indicated that ethrel (500ppm) contributed for maximum sprouting percentage of tubers (100%), earlier sprouting (6.33days), maximum plant height (99.32cm) and maximum number of leaves (34.04).
Although a great deal of research on ornamental geophytes has been conducted since the beginning of the 1990s, current information has not been comprehensively presented to researchers and horticulturalists. Covering the latest advances in geophytes science, Ornamental Geophytes: From Basic Science to Sustainable Production provides up-to-date reviews on geophyte taxonomy, physiology, genetics, production, plant protection, and postharvest biology. Novel approaches to environmentally-friendly, sustainable production and integrated management have stimulated new research directions, and innovative biochemical and molecular methods have opened new avenues in taxonomy and breeding. In addition to the issues historically associated with traditionally growing countries, the book reviews the development of new production centers in Africa, Asia, and South America. In 20 chapters, this book reflects three main trends in plant science and horticulture: A demand for sustainable and environmentally friendly production Widespread employment of new molecular technologies The globalization of the production and marketing chains Thoroughly modern and in tune with the needs and methods of the geophytes industry, Ornamental Geophytes: From Basic Science to Sustainable Production will benefit not only researchers who have been engaged for years but also new researchers and students who must meet and challenge the existing dogmas. In addition, the information contained in this book is vital to bringing the value of flower bulbs to the worldwide consumers who are the most important and last links in the chain of utilization and profitability of all ornamental products.
It has long been observed, by farmers, gardeners and botanists alike, that from time to time certain plants seem to affect certain other plants growing their near them – both favourably and unfavourably. By taking account of these relationships, farmers and gardeners can improve the quality of food and flowers, reduce losses from pests and disease, drought and frost, and enhance both satisfaction and pleasure in their work and financial profit. Years of experimentation by Richard Gregg and subsequently Helen Philbrick and others resulted in this unique reference book. It offers a detailed and comprehensive A-Z of plants and how they affect each other and their surrounding environment, including the soil, insects and birds.
Wild crop relatives are now playing a significant part in the elucidation and improvement of the genomes of their cultivated counterparts. This work includes comprehensive examinations of the status, origin, distribution, morphology, cytology, genetic diversity and available genetic and genomic resources of numerous wild crop relatives, as well as of their evolution and phylogenetic relationship. Further topics include their role as model plants, genetic erosion and conservation efforts, and their domestication for the purposes of bioenergy, phytomedicines, nutraceuticals and phytoremediation. Wild Crop Relatives: Genomic and Breeding Resources comprises 10 volumes on Cereals, Millets and Grasses, Oilseeds, Legume Crops and Forages, Vegetables, Temperate Fruits, Tropical and Subtropical Fruits, Industrial Crops, Plantation and Ornamental Crops, and Forest Trees. It contains 125 chapters written by nearly 400 well-known authors from about 40 countries.