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Item 2,4-Dichlorophenoxyacetic Acid(2007) Marquardt, R.P.; Burchfield, H.P.; Stohrs, E.E.; Arthur BevenueItem Aakasavalli adhava Moodillathali Thenginte Katuveezhcha Rogavyapana Padanathinu Oru Sahayi(1989) Sasikala, M.; Mathen, K.Item The Ability of the Invasive Red Palm Weevil, Rhynchophorus ferrugineus Infesting Oil Palm in Malaysia(2019) AHMAD BUKHARY, A K; RUSLAN, M Y; MOHD FAUZI, M M; NICHOLAS, A S; BADROL HISHAM, I; WAN KHAIRUL ANUAR, W A; NOOR HISHAM, H; IDRIS, A BItem Abnormal Stomatal Opening in Coconut Palms Affected with Root (Wilt) Disease(1986-09) Rajagopal, V.; Patil, K.D.; Sumathy Kutty Amma, B.Rajagopal, V., Patil, K. D. and Sumathykuttyamma, B. 1986. Abnormal stomatal opening in coconut palms affected with root (wilt) disease.—J. exp. Bot. 37: 1398-1405. Studies on the stomatal regulation in the root (wilt) affected coconut palms (Cocos nucifera L.) revealed that the diseased palms had low stomatal resistance compared to the healthy palms, irrespective of their age. The same trend was observed whether the determinations were made at different times of the day (6-18 h) or under irrigated and unirrigated conditions or in different seasons (dry and wet). Thus, the stomatal regulation was significantly impaired in the diseased palms resulting in excessive water loss compared to the healthy palms. Results are discussed with the available literature on other similar disease caused by fungi, bacteria and mycoplasma-like organisms in different plants.Item Abscission of flower bud pedicels in Begonia(1973) Hanisch Ten Cate, CH.H.; Bruinsma, J.Pedicel abscission of flower buds is retarded by the presence of the bud and by IAA, the buds probably preventing abscission by auxin production. Ethylene removes the retarding effect of the buds and also accelerates the abscission of pedicel explants without buds. ABA has a small accelerating effect, gibberellic acid and kinetin are inactive. The presence of vegetative plant parts enhances the abscission rate, mainly by the supply of nutrients. The difference in flower bud abscission between three Begonia clones depends on a difference in the pedicels which is probably not hormonal in nature.Item Absorption, Distribution and Utilization of Radioactive Phosphorus in Healthy and Root (Wilt) Diseased Coconut Palms(1979) Snehi Dwivedi, R.; Ray, P.K.; Sunny NinanRadioactive KH,PO4 was fed to coconut leaves and palms under laboratory and field conditions. In healthy palms the absorption of phosphorus by roots and Us accumulation In spindle and first fully opened leaves was found to be significantly higher till 9th hr as compared to that of diseased palms, but at later stages the reverse pattern was observed. The time required for 12P to reach the spindle (top-most leaf) situated at 9.5 m height In both diseased and healthy palm was found to be 3 hr only. In contrast to the leaves, the activity of P differed insignificantly in stem and roots of healthy and diseased palms and also the native P remained higher In the stem and roots of former palms as compared to latter. The analysis of total and different fractions of phosphorus and entry of P in the different forms of organic phosphorus indicated that although total P was more in the case of diseased palms but the organic phosphorus especially the nucleic acid P was significantly less as compared to healthy ones. This revealed less utilization of absorbed P in the synthesis of P-constituted organic substances in diseased palms.Item Abundant Class III acidic chitinase homologue in tamarind (Tamarindus indica) seed serves as the major storage protein(2008-02) Devavratha H. Rao; Lalitha R. GowdaItem Accumulation and subcellular distribution of cations in relation to the growth of potassium-deficient barley(1986) Leigh, R.A.; Chater, M.; Storey, R.; Johnston, A.E.Growth of barley (Hordeum vulgare L., cv. Georgie) was insensitive to soil K content above about 150 mg kg-1, but at lower levels it declined. The reduction in yield was greater in soils containing approximately 10 mg Na kg-1 than in soils with about 90 mg kg-1 : of Na. Growth was unaffected by changes in shoot K concentration above 75 mol m-3, but declined at lower concentrations, and the decrease was less in plants grown in soils with high Na. Growth responses were not simply related to tissue K concentrations because plants grown in soils with extra Na had higher yields but lower K concentrations. When soii Na was low, plants accumulated Ca as tissue K declined, but when Na was provided this ion was accumulated. Plant Mg concentrations were generally low but increased as K decreased. The Ca and Mg were osmotically active. There were highly significant inverse linear relationships between yield and either the Ca or Mg concentrations in the shoots. X-ray microanalysis was used to examine the compartmentation of cations in leaves from barley plants (cv. Clipper) grown in nutrient solutions with high and low K. concentrations. In plants grown with 2.5 mol m-3 K, this was the major cation in both the cytoplasm and vacuole of mesophyll cells. However, in plants grown with 0.02 mol m-3 K it declined to undetectable levels in the vacuole, although it was still detectable in the cytoplasm. In all plants, Ca was mainly located in epidermal cells. The implication of the results for explaining responses to K in terms of compartmentation of solutes is discussedItem Acetobacter diazotrophicus sp. nov., a Nitrogen-Fixing Acetic Acid Bacterium Associated with Sugarcane(1989-07) Gillis, M.; Kersters, K.; Hoste, B.; Janssens, D.; Stephan, M.P.; Teixeira, K.R.S.; Dobereiner, J.; De Ley, J.Results of deoxyribonUtleic acid (DNA)-ribosomal ribonucleic acid and DNA-DNA hybridizations, together with a phenotypic and chemotaxonomic analysis, revealed that nitrogen-fixing bacteria isolated from roots and stems of sugarcane belong to a new species in the genus Acetobacter, for which the name Acetobacter diazotrophicus sp. nov. is proposed. Strain LMG 7603 (= Dobereiner PAl 5 = ATCC 49037) is the type strain.Item Additional evidence of soil transmission of coconut root (wilt) pathogen(1972-07) Shanta, P.; Gopinathan Pillay, N.; Lal, S.B.A sap-transmissible pathogen resembling a virus is associated with the root (wilt) disease of coconut. This pathogen is soil borne. Cowpea plants became diseased when grown in infective soil, or in sterilized soil watered with infective leaf or root sap, or in soil to which infected roots were added. Treatment with pcntachloronitrobenzene destroyed infectivity. Air-drying for more than a week or fine grinding do not destroy infectivity. The pathogen perhaps is released through roots of infected plants. Soil water plays a major part in spread of the disease in natureItem Additional host records of root-knot nematode, Meloidogyne incognita(2007) Sundararaju, P.; Sosamma, V.K.; Koshy, P.K.Item Advances in spices research(2007) Nambiar, M.C.Item Aerotaxis and Chemotaxis of Azospirillum brasilense: A Note(1980) Yaacov Okon; Lutfu Cakmakci; Israel Nu; Ilan ChetAzospiritlum brasilense was attracted to capillaries containing either phosphate buffer, distilled water, or saline. The number of bacteria in these capillaries was 3-4 X 10^4, after 1 h of incubation, [n the presence of phosphate buffer + attractants, the number of cells accumulated in the capillary increased only to5x 10^4-I.I x 10^5 cells. It was not possible, therefore, to measure chemotaxis in A. brasilense as distinct from aerotaxis by the capillary method. Chemotaxis was observed in semi-solid agar plates and was determined by a growth band oriented towards the attractant. Positive chemotactic response was obtained with peptone, tryptone, yeast extract, amino acids, organic acids, arabinosc and galactoseItem Aetiology of the Wilt (Root) disease:Investigations on its virological nature(2007) Shanta, P.; Menon, K.P.V.; Patchu Pillai, K.Item Age of seedling at transplanting in coconut(1983-06) Satyabalan, K.The age of coconut seedling at transplanting varies in different countries according to the prevailing practices and other conditions. It depends mainly on the ecological and climatic conditions in different countries and also in the different regions within each country. Young seedlings are planted in light soils like sandy soil, loamy soil, etc. whereas older seedlings are planted in heavy soils with high water table and also in areas which are likely to be affected by cyclones and hurricanes. It is also reported that in the case of older seedling while transplanting shock is greater and chances of mortality higher, the period of immaturity in the field is reduced. Another advantage of planting older seedlings is the lesser cost of maintaining these seedlings in a nursery than managing them in a plantation. In the case of young seedlings, selection on the basis of vigorous growth characters is difficult whereas in the case of older seedlings rigorous selection is possible. Thus there are merits and demerits in the practices followed by farmers in different countries. Research workers on coconut should consider and study all these aspects and recommend suitable practices to the farmers so that the time lag between planting and flowering of the seedlings as a result of transplanting shock is reduced to the minimum which will be of immense benefit to farmers of this economically important perennial crop.Item Agriculture research and development - experiences in Lakshadweep Islands(2001) Bopaiah, M.G.