Growth of the gynophore of the peanut Arachis hypogaea. 2. Regulation of growth

1990 ◽  
Vol 68 (5) ◽  
pp. 965-978 ◽  
Author(s):  
Deborah D. Shushu ◽  
Elizabeth G. Cutter
Keyword(s):  
Gibberellic Acid ◽  
Arachis Hypogaea ◽  
Indoleacetic Acid ◽  
Soil Surface ◽  
Triiodobenzoic Acid ◽  
Arachis Hypogaea L ◽  
Low Concentrations ◽  
Intercalary Meristem ◽  
Growth Promoting ◽  
Regulation Of Growth

It was previously shown that removal of the ovary, which occupies the distal millimetre, caused cessation of growth of the gynophore and its intercalary meristem, suggesting that the ovary was a source of growth-promoting substances. Control of growth was studied in the gynophore of the peanut Arachis hypogaea L., cv. Bukene No. 2. Low concentrations of indoleacetic acid promoted growth of decapitated gynophores, whereas high levels inhibited elongation. Gibberellic acid promoted growth of the decapitated gynophores, whereas kinetin inhibited growth at all concentrations used. A combination of indoleacetic acid and gibberellic acid promoted extension growth of the decapitated gynophores above that of the intact gynophores; this was characterized, however, by a different pattern of cell division and cell elongation from that observed in the intact gynophores. Indoleacetic acid affected the "youngest" tissues, whereas gibberellic acid affected the whole length of the growing zone. High levels of indoleacetic acid caused diageotropism of the gynophores. Application of [14C] indoleacetic acid to vertical gynophores after the ovary was excised indicated that indoleacetic acid became redistributed to one side, resulting in horizontal bending. Thus an increased amount of auxin from the enlarging ovary may be involved in placing the ovary parallel to the soil surface when it reaches a suitable depth in the soil, during normal geocarpic development. Triiodobenzoic acid reduced growth when applied in lanolin as a ring between the ovary and the meristem but not when applied proximal to the meristem, suggesting that triiodobenzoic acid prevented the transport of auxin from the ovary to the meristem.

Plant Growth–Promoting Methylobacterium Induces Defense Responses in Groundnut (Arachis hypogaea L.) Compared with Rot Pathogens

2006 ◽  
Vol 53 (4) ◽  
pp. 270-276 ◽  
Author(s):  
M. Madhaiyan ◽  
B. V. Suresh Reddy ◽  
R. Anandham ◽  
M. Senthilkumar ◽  
S. Poonguzhali ◽  
...  
Keyword(s):  
Plant Growth ◽  
Arachis Hypogaea ◽  
Defense Responses ◽  
Arachis Hypogaea L ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Diversity, activity, and effectiveness of Rhizobium bacteria as plant growth promoting rhizobacteria (PGPR) isolated from Dieng, central Java

2021 ◽  
Author(s):  
Sri Purwaningsih ◽  
Dwi Agustiyani ◽  
Satjiya Antonius
Keyword(s):  
Plant Growth ◽  
Arachis Hypogaea ◽  
Congo Red ◽  
Plant Growth Promoting Rhizobacteria ◽  
Bromothymol Blue ◽  
Protease Enzyme ◽  
Arachis Hypogaea L ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Phosphate Solubilizing

Background and Objectives: This study was aimed to isolate Rhizobium spp., from the plant rhizosphere and to investigate their effects on the growth of peanut (Arachis hypogaea L.) as plant growth-promoting rhizobacteria (PGPR). Materials and Methods: The isolates were characterized using YEMA, YEMA + Congo Red, and YEMA + Bromothymol blue (BTB) media. The Rhizobium was tested qualitatively for their ability to produce indole acetic acid (IAA), siderophores, proteases, nitrogenases as well as phosphate solubilizing activity. A greenhouse experiment was carried out to elucidate the effect of Rhizobium inoculation on Arachis hypogaea L. growth. Results: Eleven isolates were obtained in YEMA media and they were red-pink in the YEMA + Congo Red media. The YEMA + BTB test showed that 2 isolates were slow-growing and the rest were fast-growing isolates. Seven isolates produced siderophores, 5 were capable of phosphate solubilizing, 9 isolates produced protease enzyme, 4 isolates could produce IAA, and 7 isolates could fix nitrogen. The B1 and the combination of some high trait-isolate treatments in Y gave the best results on Arachis hypogaea L. growth. Conclusion: These isolates can be developed as biological fertilizer agents for the peanut plant.

scholarly journals Response of groundnut (Arachis hypogaea L.) to plant growth promoting Rhizobacteria in degraded soils

2018 ◽  
Vol 13 (17) ◽  
pp. 904-910 ◽  
Author(s):  
Kausar Rahina ◽  
Iqbal Choudhary Muhammad ◽  
Imran Akram Muhammad ◽  
Rashid Muhammad ◽  
Ur Rehman Obaid ◽  
...  
Keyword(s):  
Plant Growth ◽  
Arachis Hypogaea ◽  
Plant Growth Promoting Rhizobacteria ◽  
Arachis Hypogaea L ◽  
Plant Growth Promoting ◽  
Growth Promoting

Physiological studies on dormancy in seeds of groundnut (Arachis hypogaea L.). III. Changes in auxin and growth inhibitor contents during development of the seeds of a dormant and a non-dormant cultivar

1971 ◽  
Vol 19 (3) ◽  
pp. 273 ◽  
Author(s):  
N Sreeramulu ◽  
IM Rao
Keyword(s):  
Arachis Hypogaea ◽  
Growth Inhibitor ◽  
Neutral Fraction ◽  
Growth Substances ◽  
Arachis Hypogaea L ◽  
Acidic Fraction ◽  
Rf Values ◽  
Bioassay Technique ◽  
Growth Promoting ◽  
Rice Coleoptile

Growth substances in developing seeds of dormant and non-dormant cultivars of groundnut were chromatographically separated, and their content at various RF values estimated by the rice coleoptile bioassay technique. Growth promotors increased from 20 to 30 days in the acidic and neutral fractions of the dormant and non-dormant seeds. From 30 days onwards, growth promotors decreased while inhibitors accumulated, but their relative proportions varied in the two types of seeds. In mature non-dormant seeds, the content of growth promotors in the acidic fraction was higher than that of inhibitors; in dormant seeds it was lower. In the neutral fraction the content of inhibitors was higher than that of promotors in seeds of both types. The balance of growth-promoting and inhibiting substances in relation to seed development and dormancy is discussed, and it is concluded that the acidic inhibitors are responsible for dormancy in groundnut seeds.

Response of Peanut to PGR-IV™ Growth Regulator1

1996 ◽  
Vol 23 (1) ◽  
pp. 54-57 ◽  
Author(s):  
Alan C. York ◽  
Roger B. Batts ◽  
A. Stanley Culpepper
Keyword(s):  
North Carolina ◽  
Gibberellic Acid ◽  
Arachis Hypogaea ◽  
Field Experiments ◽  
Fermentation Broth ◽  
Branch Length ◽  
Lateral Branch ◽  
Indolebutyric Acid ◽  
Net Returns ◽  
Arachis Hypogaea L

Abstract Field experiments in North Carolina in 1994 and 1995 determined virginia-type peanut (Arachis hypogaea L.) response to PGR-IV, a commercial hormonal growth regulator consisting of 30 mg/L of gibberellic acid, 27 mg/L of indolebutyric acid, and a proprietary fermentation broth. Treatments included PGR-IV applied once at 438 mL/ha 21, 45, 60, or 75 DAE (days after peanut emergence) or twice at 219 mL/ha at 21 and 45 DAE or 45 and 60 DAE. PGR-IV had no effect on peanut main stem or cotyledonary lateral branch length, yield, maturity, percentage of fancy pods, extra large kernels, or total sound mature kernels, or net returns.

scholarly journals Uji Efektivitas Saat Pemberian dan Konsentrasi PGPR (Plant Growth Promoting Rhizobacteria) terhadap Produksi dan Mutu Benih Kacang Tanah (Arachis hypogaea L.)

2017 ◽  
Vol 1 (2) ◽  
pp. 174-184 ◽  
Author(s):  
Nailul Marom ◽  
FNU Rizal ◽  
Mochamat Bintoro
Keyword(s):  
Plant Growth ◽  
Arachis Hypogaea ◽  
Plant Growth Promoting Rhizobacteria ◽  
Arachis Hypogaea L ◽  
Plant Growth Promoting ◽  
Growth Promoting

Produksi dan mutu benih kacang tanah (Arachis hypogaea L.) dapat ditingkatkan dengan menggunakan PGPR (Plant Growth Promoting Rhizobacteria). Tujuan dari penelitian ini adalah  untuk mengetahui produksi dan mutu benih kacang tanah dengan perbedaan saat pemberian dan perbedaan konsentrasi PGPR. Penelitian ini dilaksanakan pada bulan Agustus sampai November 2016 dengan Rancangan Acak Kelompok (RAK) dengan 2 faktor. Faktor pertama adalah saat pemberian PGPR terdiri dari saat perendaman (W1), saat tanam (W2) dan saat fase vegetatif (W3). Faktor kedua adalah konsentrasi PGPR yang terdiri dari 0 ml/l (K0), 7,5 ml/l (K1), 10 ml/l (K2), dan 12,5 ml/l (K3). Parameter yang diamati adalah pertambahan tinggi tanaman, umur berbunga rata-rata, jumlah polong per rumpun tanaman, berat basah polong per rumpun tanaman, berat kering polong per rumpun tanaman, bobot 100 butir benih, produksi polong kering per hektar, daya berkecambah benih, Kecepatan tumbuh Benih, Dan keserempakan tumbuh benih. Hasil penelitian menunjukkan bahwa perlakuan terbaik adalah konsentrasi PGPR 12,5 ml/l yang memberikan pengaruh nyata sampai sangat nyata pada parameter pertambahan tinggi tanaman pada fase vegetatif (15 HST sampai 30 HST), pertambahan tinggi tanaman pada stadium pembentukan polong ( 30 HST sampai 45 HST), umur berbunga rata-rata, berat basah polong per rumpun, berat kering polong per rumpun, bobot 100 butir benih, dan produksi polong kering per hektar.

scholarly journals Greenhouse Screening Peanut Germ Plasm for Resistance to the Lesser Cornstalk Borer1

1980 ◽  
Vol 7 (2) ◽  
pp. 68-71 ◽  
Author(s):  
J. W. Smith ◽  
Lazaro Posada ◽  
O. D. Smith
Keyword(s):  
Developmental Stage ◽  
Arachis Hypogaea ◽  
Germ Plasm ◽  
Soil Surface ◽  
Surface Damage ◽  
Rapid Technique ◽  
First Instar ◽  
Arachis Hypogaea L ◽  
Elasmopalpus Lignosellus ◽  
Greenhouse Screening

Abstract An objective, rapid technique was developed for greenhouse screening of peanuts, (Arachis hypogaea L.), germ plasm for resistance to lesser cornstalk borer, Elasmopalpus lignosellus (Zeller). Seedlings planted one per container were infested with first instar larvae. Twenty-one days after infestation the plants were scored for damage visible above the soil surface, damage concealed by the soil surface, and survival. Larvae were scored for developmental stage and survival. Entries were screened in groups of 16 including the cultivar ‘Starr’ as a standard. Evaluations were made of 490 cultivars, introductions and selections. Eighty-one cultivars scored significantly lower (p≥.05) than Starr in one or more rating categories. Re-evaluation of certain cultivars coupled with an analysis of the Starr standard entry show the techniques to be effective in selecting for resistance to the lesser cornstalk borer.

Sign in / Sign up

Export Citation Format

Share Document