http://hdl.handle.net/10125/565 Sun, 19 May 2013 19:08:10 GMT 2013-05-19T19:08:10Z http://hdl.handle.net/10125/20389 Thesis (Ph.D.)--University of Hawaii at Manoa, 2008.; A series of experiments were carried out in order to evaluate the effectiveness of a phosphate-solubilizing fungus (PSF), identified as Mortierella sp., to enhance plant phosphate (Pi) uptake and growth. The fungus was isolated from the rhizoplane of Leucaena leucocephala grown in a Hawai'ian Andisol. An in-vitro test was developed to test the capacity of this fungus in dissolving rock phosphate (RP) by means of oxalic acid production in the presence of different types of soil. This PSF could desorb sorbed-Pi from soil mineral surfaces. The presence of high Pi sorbing soil minerals impaired the PSF effectiveness to enhance the supply of soluble Pi. The capacity of the fungus to solubilize P was N-source dependent, being enhanced to a greater extent by ammonium than by nitrate. This PSF was aluminum tolerant and moderately tolerant of low solution pH and its capacity to reduce solution pH and absorb Pi was not affected by these factors.; In contrast, Mortierella sp. alone was able to increase plant growth and Pi uptake of mycorrhiza-free leucaena grown in a low Pi-sorbing Mollisol without RP addition. In summary, four major factors can control the effectiveness of PSM to increase soil solution Pi, plant P uptake and growth: soil Pi sorbing capacity, mycorrizal association, calcium phosphate content of soils, and the use of ammonium as nitrogen source.; In very high Pi sorbing soils (Andisols), Mortierella sp. was not able to increase leucaena growth and Pi uptake, even in the presence of the mycorrhizal association and moderate amounts of RP (P: 300 mg/kg).; Under greenhouse conditions was determined the PSF effectiveness to enhance Pi uptake and growth of mycorrhized (Glomus aggregatum and G. fistulosum) leucaena grown in highly weathered Oxisols. The PSF effectiveness was higher if moderate amounts of RP (P: 150-600 mg/kg) were added to the Oxisol. When RP was not added, the effect of PSF inoculation was not significant. With high amounts of RP (P: 1200 and 2400 mg/kg), the effect of the fungus on leucaena was either nil or negative. Moreover, in the absence of mycorrizal association the effect of PSF inoculation was not significant.; Includes bibliographical references (leaves 359-392).; Also available by subscription via World Wide Web; 391 leaves, bound 29 cm Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10125/20389 2008-01-01T00:00:00Z Osorio, Nelson Walter http://hdl.handle.net/10125/20388 Thesis (M.S.)--University of Hawaii at Manoa, 2007.; Includes bibliographical references (leaves 145-146).; vi, 146 leaves, bound ill., maps 29 cm Mon, 01 Jan 2007 00:00:00 GMT http://hdl.handle.net/10125/20388 2007-01-01T00:00:00Z Delisle, Laura B http://hdl.handle.net/10125/13476 Typescript. Thesis (Ph. D.)--University of Hawaii, 1949. Bibliography: leaves 42-47. Wed, 01 Jun 1949 00:00:00 GMT http://hdl.handle.net/10125/13476 1949-06-01T00:00:00Z Ayers, Arthur http://hdl.handle.net/10125/12043 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1977.; Bibliography: leaves 254-273.; Microfiche.; xiv, 273 leaves ill Sat, 01 Jan 1977 00:00:00 GMT http://hdl.handle.net/10125/12043 1977-01-01T00:00:00Z Asghar, Mohammad http://hdl.handle.net/10125/12042 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1976.; Bibliography: leaves 162-177.; Microfiche.; 177 leaves ill Thu, 01 Jan 1976 00:00:00 GMT http://hdl.handle.net/10125/12042 1976-01-01T00:00:00Z Mukhtār, Muḥammad http://hdl.handle.net/10125/12041 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1975.; Bibliography: leaves [123]-133.; xi, 133 leaves ill. (some col.), maps Wed, 01 Jan 1975 00:00:00 GMT http://hdl.handle.net/10125/12041 1975-01-01T00:00:00Z Pyon, Jong Yeong http://hdl.handle.net/10125/12040 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1975.; Bibliography: leaves 129-138.; xii, 138 leaves ill. (some col.) Wed, 01 Jan 1975 00:00:00 GMT http://hdl.handle.net/10125/12040 1975-01-01T00:00:00Z Floresca, Emmanuel T http://hdl.handle.net/10125/12039 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1974.; Bibliography: leaves [187]-195.; xx, 195 leaves ill Tue, 01 Jan 1974 00:00:00 GMT http://hdl.handle.net/10125/12039 1974-01-01T00:00:00Z Rao, Palakurthi Suresh Chandra http://hdl.handle.net/10125/12038 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1974.; Bibliography: leaves 191-204.; xvii, 204 leaves ill Tue, 01 Jan 1974 00:00:00 GMT http://hdl.handle.net/10125/12038 1974-01-01T00:00:00Z Stoop, Willem Adriaan http://hdl.handle.net/10125/12037 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1974.; Bibliography: leaves 160-167.; xiv, 167 leaves ill Tue, 01 Jan 1974 00:00:00 GMT http://hdl.handle.net/10125/12037 1974-01-01T00:00:00Z Balasubramanian, Vethaiya http://hdl.handle.net/10125/12036 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1973.; Bibliography: leaves [169]-176.; xii, 176 l illus., tables Mon, 01 Jan 1973 00:00:00 GMT http://hdl.handle.net/10125/12036 1973-01-01T00:00:00Z Escalada, Rodolfo G http://hdl.handle.net/10125/12035 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1973.; Bibliography: leaves [214]-219.; xiii, 240 l illus., tables Mon, 01 Jan 1973 00:00:00 GMT http://hdl.handle.net/10125/12035 1973-01-01T00:00:00Z Dangler, E. W (Edgar W.), 1920 http://hdl.handle.net/10125/12034 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1972.; Bibliography: leaves [192]-206.; xvi, 206 l illus., tables Sat, 01 Jan 1972 00:00:00 GMT http://hdl.handle.net/10125/12034 1972-01-01T00:00:00Z Sinanuwong, Somsri http://hdl.handle.net/10125/12033 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1972.; Bibliography: leaves [189]-197.; xiv, 197 l illus. (part col.), map, graphs, tables Sat, 01 Jan 1972 00:00:00 GMT http://hdl.handle.net/10125/12033 1972-01-01T00:00:00Z Ezumah, Humphrey Chukonoyere http://hdl.handle.net/10125/12032 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1972.; Bibliography: leaves [161]-171.; xvi, 171 l illus., tables Sat, 01 Jan 1972 00:00:00 GMT http://hdl.handle.net/10125/12032 1972-01-01T00:00:00Z Shin, Han Poong http://hdl.handle.net/10125/12031 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1972.; Bibliography: leaves [255]-268.; xiii, 268 l illus., tables Sat, 01 Jan 1972 00:00:00 GMT http://hdl.handle.net/10125/12031 1972-01-01T00:00:00Z Nangju, Dimyati http://hdl.handle.net/10125/12030 Typescript.; Thesis (Ph. D.)--University of Hawaii at Manoa, 1972.; Bibliography: leaves [160]-168.; xii, 168 l illus. tables Sat, 01 Jan 1972 00:00:00 GMT http://hdl.handle.net/10125/12030 1972-01-01T00:00:00Z Goswami, Kishore Puri http://hdl.handle.net/10125/12029 Typescript.; Thesis (Ph. D.)--University of Hawaii, 1970.; Bibliography: leaves [154]-157.; Microfilm.; xxi, 259 l illus., maps, graphs, tables Thu, 01 Jan 1970 00:00:00 GMT http://hdl.handle.net/10125/12029 1970-01-01T00:00:00Z Schroth, Charles Lorenz http://hdl.handle.net/10125/12028 Typescript.; Thesis (Ph. D.)--University of Hawaii, 1970.; Bibliography: leaves [215]-226.; Microfilm.; xix, 226 l diagrs Thu, 01 Jan 1970 00:00:00 GMT http://hdl.handle.net/10125/12028 1970-01-01T00:00:00Z Obien, S. R (Santiago Rigonan) http://hdl.handle.net/10125/12027 Typescript.; Thesis (Ph. D.)--University of Hawaii, 1969.; Bibliography: leaves 183-204.; xi, 204 l illus Wed, 01 Jan 1969 00:00:00 GMT http://hdl.handle.net/10125/12027 1969-01-01T00:00:00Z Adlan, Hassan Ali