scholarly journals Differential Response of Inoculation with Indole Acetic Acid Producing Pseudomonas Sp. In Green Gram (Vigna radiata L.) and Black Gram (Vigna mungo L.)

2011 ◽  
Vol 1 (5) ◽  
pp. 159-173 ◽  
Author(s):  
O.P. Jangu ◽  
S.S. Sindhu
Author(s):  
Anbarasu Mariyappillai ◽  
Gurusamy Arumugam ◽  
Swaminathan Chitraputhira Pillai ◽  
Durai Singh Ramaiah

Background: Black gram (Vigna mungo L.) and Green gram (Vigna radiata L.) were mostly used as chemical residue indicators for testing the persistence of pesticides, fungicides and herbicides, etc. in the soil. Presently, the coir pith was used as a medium of nursery for many seeds and seedling production. This study evaluated the inhibition effects and screening of allelopathic chemicals from aqueous extracts of coir pith and composting coir pith on the back gram and green gram by response index method and GCMS/MS analysis. Methods: The coir pith and composted coir pith soaked the ratio of 1:10 for 24 hrs, filtered through Whatman No.1 filter paper. The inhibition effect tested for germination and seedling growth of black gram and green gram was sown in poly pots. The carbon: nitrogen ratio and the total organic carbon were analyzed by dry combustion method, Kjeldahl method and GCMS/MS analysis. Result: The phytotoxic substances are present in coir pith, which can be exterminated by composting the coir pith for better growth and development of seedlings. The negative response index (RI), high C: N ratio and chemical compounds like tocopherol, fucoxanthin, tetramethyl heptadeca, dichloroacetamide, tetrazole, hydroxyethyl palmitate, neocurdione and uridine derivations present in raw coir may have the phytotoxic effect and produced yellowing symptoms in young plants compared to composted coir pith. This is exterminated by composting the coir pith for better growth and development of seedlings as well as used for various agricultural and horticultural nurseries.


2016 ◽  
Vol 1 (01) ◽  
pp. 38-42 ◽  
Author(s):  
Anna Tefa ◽  
Eny Widajati ◽  
Muhamad Syukur ◽  
Giyanto Giyanto

Studi tentang bakteri probiotik dilakukan untuk mendapatkan jenis bakteri yang mempunyai kemampuan menghambat pertumbuhan Colletotrichum acutatum penyebab penyakit antraknosa pada cabai. Tujuan penelitian ini adalah memperoleh bakteri probiotik yang bersifat antagonis terhadap C. acutatum serta mencegah penyakit terbawa benih (seedborne diseases). Tata letak percobaan disusun menurut Rancangan Acak Lengkap pola faktorial dengan dua faktor. Faktor pertama adalah coating benih yang terdiri dari 6 taraf yaitu kontrol /tanpa coating (c0), coating tanpa bakteri (c1), coatingBacillus sp. (c2), coating Pseudomonas sp. (c3), coating Actinomycetes sp. (c4) dan coating fungisida (c5). Faktor kedua adalah periode simpan yaitu 0, 1 , 2, 3, 4 dan 5 bulan. Hasil penelitian menunjukkan bahwa terdapat 3 bakteri yang bersifat antagonis terhadap C. acutatum yaitu Actinomycetes sp. (ATS6) dengan persentase hambatan 56,8%, Bacillus sp. (B48) 56,7% dan Pseudomonas sp. (P12) 46,7%. Aplikasi bakteri probiotik meningkatkan viabilitas dan kesehatan benih cabai pada periode simpan 5 bulan, pada tolok ukur potensi tumbuh maksimum 80-84%, daya berkecambah 76-78,7%, benih terinfeksi pada coating Actinomycetes sp., 2,67% dan Bacillus sp., 6,7%.Bacillus sp. mengandung indole acetic acid (IAA) 91,8 ppm dan giberelin (GA3) 103,2 ppm. Actinomycetes sp. mengandung 89,6 ppm IAA dan GA3 92,5 ppm, dan Pseudomonas sp. mengandung 68,9 ppm IAA dan GA3 69,2 ppm. ©2016 dipublikasikan oleh Savana Cendana.


1999 ◽  
Vol 47 (4) ◽  
pp. 601 ◽  
Author(s):  
C. J. Lambrides ◽  
A. T. James ◽  
R. J. Lawn ◽  
R. W. Williams

The position of Australian accessions of wild mungbean (Vigna radiata ssp. sublobata) in the Asiatic Vigna gene pool was examined by assessing their cross fertility with the green gram cultigen (Vigna radiata ssp. radiata) and black gram (Vigna mungo). No difficulties were encountered in obtaining F 1 and backcross seed in crosses with green gram. The hybrid progenies were vegetatively vigorous and fully fertile. Inheritance of traits appeared normal and, where direct comparisons were possible, consistent with crosses within the cultigen. Inheritance of a new seed mottling gene is presented and several linked traits were found. Crosses with black gram proved difficult to achieve, and the resulting hybrid seed showed varying degrees of viability. Individuals that germinated were weak, and if they survived to flower, possessed low pollen fertility and poor seed set. It was concluded that indigenous Australian accessions of wild mungbean belong to the primary gene pool of Vigna radiata.


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