scholarly journals Effects of Indole-3-Acetic Acid on Germination in Lead Polluted Petri Dish of Citrullus lanatus (Thunberg) Matsumura and Nakai, Cucurbitaceae

2015 ◽  
Vol 4 (3) ◽  
Author(s):  
Matthew Chidozie Ogwu ◽  
Aiwansoba Raymond Osas ◽  
Osawaru Moses Edwin
Keyword(s):  
Acetic Acid ◽  
Citrullus Lanatus ◽  
Combined Treatment ◽  
Petri Dish ◽  
Germination Percentage ◽  
Treatment Level ◽  
Optimum Level ◽  
Polluted Environment ◽  
Tropical Fruit ◽  
Indole 3 Acetic Acid

Watermelon, <em>Citrullus lanatus </em>(Thunberg) Matsumura and Nakai is a tropical fruit vegetable. Indole-3-acetic acid (IAA) is a popular phytohormone while lead (Pb) is a common environmental pollutant in urban and sub-urban centers. <em>C. lanatus</em> were obtained from Benin City with a view to study the effects of IAA on their germination in Pb polluted environment.  Germination percentage without IAA and Pb treatment in petri dish was significant after ten days. Hastened germination was observed when IAA and lead were used. About 100 % germination was recorded after seven days. This suggests that water melon seeds can initiate growth even in lead polluted environment. Optimum level of 5 ppm IAA with the different levels of lead treatments may be recommended. Most important was that higher concentrations of Pb in the control (without IAA) did not inhibit seedling shoot nor root growth. Longest seedling shoot length (cm) was 10.33 ± 1.24 and 12.13 ± 2.06 on the seventh and eighth day respectively with the combined treatment levels of 1 ppm IAA and 15 ppm Pb. On the ninth day, 15.27 ± 0.96 was obtained from 1 ppm IAA and 20 ppm Pb. Longest seedling root length (cm) values were recorded from the combined treatment levels of 0 ppm IAA and 10 ppm Pb for the seventh (9.10 ± 0.47) and ninth (10.37 ± 1.81) day respectively and 0 ppm and 15 ppm Pb on the eighth (9.37 ± 0.84) day. Significant means were also obtained with the treatment level of 0 and 20 ppm IAA. This present study suggest the germination of <em>C. lanatus</em> under Pb polluted environment may be rescued with optimum IAA.

scholarly journals Volatile 1-octanol of tea (Camellia sinensis L.) fuels cell division and indole-3-acetic acid production in phylloplane isolate Pseudomonas sp. NEEL19

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Poovarasan Neelakandan ◽  
Chiu-Chung Young ◽  
Asif Hameed ◽  
Yu-Ning Wang ◽  
Kui-Nuo Chen ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Cell Division ◽  
Petri Dish ◽  
Gas Chromatography Mass Spectrometry ◽  
Dependent Manner ◽  
Tea Leaves ◽  
Acetic Acid Production ◽  
Iaa Production ◽  
Solvent Tolerant ◽  
Indole 3 Acetic Acid

AbstractTea leaves possess numerous volatile organic compounds (VOC) that contribute to tea’s characteristic aroma. Some components of tea VOC were known to exhibit antimicrobial activity; however, their impact on bacteria remains elusive. Here, we showed that the VOC of fresh aqueous tea leaf extract, recovered through hydrodistillation, promoted cell division and tryptophan-dependent indole-3-acetic acid (IAA) production in Pseudomonas sp. NEEL19, a solvent-tolerant isolate of the tea phylloplane. 1-octanol was identified as one of the responsible volatiles stimulating cell division, metabolic change, swimming motility, putative pili/nanowire formation and IAA production, through gas chromatography-mass spectrometry, microscopy and partition petri dish culture analyses. The bacterial metabolic responses including IAA production increased under 1-octanol vapor in a dose-dependent manner, whereas direct-contact in liquid culture failed to elicit such response. Thus, volatile 1-octanol emitting from tea leaves is a potential modulator of cell division, colonization and phytohormone production in NEEL19, possibly influencing the tea aroma.

scholarly journals Effect of Gibberellic Acid and Indole 3-Acetic Acid on Seed Germination Performance of Horse gram (Macrotyloma uniflorum) Lam (Verdc)

2016 ◽  
Vol 1 (2) ◽  
pp. 36 ◽  
Author(s):  
J. Lalitha ◽  
Haseena Rafath ◽  
M. Subash
Keyword(s):  
Acetic Acid ◽  
Seed Germination ◽  
Plant Growth ◽  
Gibberellic Acid ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Germination Percentage ◽  
Potential Growth ◽  
Macrotyloma Uniflorum ◽  
Indole 3 Acetic Acid

The experiment was undertaken with an objective to investigate the effect of various concentrations of plant growth regulators, i.e., Gibberellic acid (GA3) and Indole 3-acetic acid (IAA) on seed germination of Macrotyloma uniflorum. Seeds were soaked for 12 hours in different concentrations substances (1.0, 2.0, 3.0 and 4.0 mg/L) of IAA, GA3 and control set was soaked only in distilled water.  Three replicates of each treatment with fifty seeds per replicate were arranged for precise physiological analysis. Significant variation was found in all aspects after analysis of variance (ANOVA) of each mean value. After two weeks of seed soaking, it was noted that germination percentages were significantly accelerated by lower concentrations (1 and 2 mg) of used hormones. Amongst the two potential growth regulators, 2 mg/L was found most effective because it showed highest germination percentage for IAA (93%) and GA3 (88%). A great deal of information relating to seed germination practices shows that these plant growth regulators were efficient in overcoming dormancy leading to rapid seed germination. IAA was selected as best hormone in this study, which showed highest seed germination (93%). 

scholarly journals UTILIZATION OF SOIL-APPLIED AUXINS FOR SYNCHRONIZATION OF FRUIT SET AND YIELD INCREASE IN CITRULLUS LANATUS.

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 642g-643
Author(s):  
Dean Martens ◽  
Tim Hartz ◽  
William Frankenberger
Keyword(s):  
Acetic Acid ◽  
Residence Time ◽  
Hplc Analysis ◽  
Fruit Set ◽  
Citrullus Lanatus ◽  
Early Growth ◽  
Yield Increase ◽  
Application Rates ◽  
Indole 3 Acetic Acid ◽  
Optimum Application

Exogenous application of auxins to plants has been reported to increase flowering, fruit set and decrease fruit abcission. This laboratory and field study determined that two auxins, identified by HPLC analysis with a long soil residence time and a high conversion to indole-3-acetic acid, synchronized and increased harvest of melons. The two watermelon varieties, `Tiffany' (seedless) and `Picnic' (seed) were treated with auxin and tryptophan (TRP) concentrations ranging from 10-4 to 10-10 M applied to the root ball one week before transplanting to a Buren soil. Optimum application levels (10-6 to 10-9 M) resulted in 86, 92 and 86% of the total harvested Tiffany melons mature at one date for the auxins and TRP, respectively, compared to <70% for the control plants. Optimum application rates significantly increased harvested weight 4.0 and 5.3 kg (Tiffany) and 10.0 to 10.5 kg (Picnic) plant-1. Soil-application of auxins and TRP significantly increased the number of harvested Tiffany melons, increased both weight and harvested number of Picnic melons and increased the uniformity of the harvested melons in both varieties when compared with control plants. Measurements of early growth, branching and early fruit set were not significantly correlated with harvest weight or number of harvested melons but auxin and TRP application stimulated flowering in both melons by 7-10 days.

scholarly journals Pengaruh Rizobakteri Penghasil Indole-3-Acetic Acid Terhadap Perkecambahan Biji Tanaman Padi (Oryza sativa L.)

2021 ◽  
Vol 28 (2) ◽  
pp. 117-123
Author(s):  
Sutrisno Sutrisno
Keyword(s):  
Acetic Acid ◽  
Oryza Sativa ◽  
Analysis Of Variance ◽  
Oryza Sativa L ◽  
Petri Dish ◽  
Indole 3 Acetic Acid ◽  
Range Test

Rizobakteri penghasil Indole-3-Acetic Acid (IAA) berpotensi digunakan sebagai agen biostimulan tanaman padi untuk mendukung pertanian berkelanjutan. Penelitian ini bertujuan untuk menganalisis pengaruh rizobakteri penghasil IAA terhadap perkecambahan tanaman padi (Oryza sativa L.). Isolat rizobakteri penghasil IAA yang digunakan dalam penelitian ini telah diisolasi sebelumnya dengan kode KP2, KP6, KP9 dan KP14. Biji padi IR64 disterilisasi permukaannya dengan menggunakan larutan NaOCl 5%. Biji kemudian direndam dalam suspensi isolat dan dikecambahkan dalam petri dish steril. Analisis hasil penelitian dilakukan dengan menggunakan metode one-way analysis of variance (ANOVA) dan uji lanjut yaitu duncan’s multiple range test (DMRT). Hasil penelitian menunjukkan bahwa prosentase perkecambahan tertinggi adalah kelompok perlakuan KP6 yaitu 98,67 ± 1,15 %. Perlakuan dengan isolat KP2 memiliki pengaruh terbesar terhadap panjang tunas yaitu 5,76 ± 0,77 cm. Panjang tunas kecambah dengan perlakuan KP2 dan KP6 berbeda nyata terhadap kontrol. Ukuran panjang akar tertinggi adalah 9,49 ± 0,41 cm dengan perlakuan isolat KP9. Panjang total kecambah dan indeks vigor pada semua perlakuan berbeda nyata dibandingkan kontrol dengan nilai tertinggi berturut-turut yaitu 9,48 ± 0,33 cm dan 935 ± 74 pada kelompok perlakuan KP2. Kesimpulan penelitian ini adalah bahwa isolat rizobakteri penghasil IAA pada penelitian ini berpengaruh positif secara signifikan terhadap perkecambahan tanaman padi pada parameter panjang total dan indeks vigor kecambah padi.

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