Effect of chemical sprays and management practices on Brachiaria ruziziensis seed production

Antony, Edna; Sridhar, K.; Kumar, Vinod

doi:10.1016/j.fcr.2017.06.009

Cited by 8 publications

(5 citation statements)

References 18 publications

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“…Exogenous application of L-T increases the level of auxin in plant tissues. The positive response of the application of this amino acid to B germination and growth performance of crops has been reported by different researchers in chickpea [17], tomato [18], Brachiaria ruziziensis [19], and wheat [20]. Among plant species, varied threshold tolerances and diverse decline ratios of yield or quality are seen and this demonstrates that there is variation in salt tolerance mechanisms [3].…”

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confidence: 64%

The Effect of L-Tryptophan and Melatonin on Seed Germination of Some Cool Season Vegetable Species Under Salinity Stress

Hancı

2019

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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This study was carried out with the objective to evaluate the effects of different concentrations of L-Tryptophan and Melatonin pretreatment on germination behavior of onion, leek, black carrot, and radish seeds exposed to saline stress. Seeds of samples were soaked for 24 hours in distilled water, 50,100, 150 ppm L-tryptophan, and 1.5, 3, and 4.5 µM melatonin solutions at 20° C in darkness. Seeds were placed in Petri dishes and watered to moisten the filter paper with different concentrations of NaCl (0, 150, 300 or 450 mM). The experiment was planned in a completely randomized design with four replications. Maximum germination percentage, germination index, time to complete 50% germination and mean germination time was measured at the end of the study. The results indicated that the effect of pre-treatment was significant on all studied traits in all species except for mean germination time for black carrot seeds. In addition, all germination parameters of seeds were delayed and decreased by salinity increasing from 0 mM to 450 mM NaCl. Overall, all doses of melatonin increased the maximum germination ratio and germination index values slightly under 300 mM NaCl stress conditions. In general, results which obtained from all doses of melatonin were close to each other, whereas increasing doses of L-tryptophan caused a negative effect in some cases.

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confidence: 64%

The Effect of L-Tryptophan and Melatonin on Seed Germination of Some Cool Season Vegetable Species Under Salinity Stress

Hancı

2019

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…Thus, greater growth in height may increase lateral branching but not result in a greater number of panicles per unit area because lateral branching may be a drain of photoassimilates that would go to reproductive structures. According to HOPKINSON et al (1998) andANTONY et al (2017), the high rate of development of vegetative tillers, at the same time as reproductive tillers, can be a physiological drain of photoassimilates that would go to the seeds; thus, management aiming seed production should prioritize synchronization in the emission of reproductive tillers.…”

Section: Resultsmentioning

confidence: 99%

“…The high rate of development of vegetative tillers, at the same time as reproductive tillers, represents a competitive drain on photoassimilates that would go to the seeds. Thus, management aiming seed production should prioritize the emission of reproductive tillers (HOPKINSON et al, 1998;ANTONY et al, 2017). Plant defoliation to increase the light that hits the base of the canopy (LOCH et al, 1999;GARCEZ NETO et al, 2002;PAULA et al, 2012) may favour the development of basal buds while simultaneously leading to synchronous growth and flowering of tillers, with greater production of reproductive tillers than vegetative tillers.…”

Section: Introductionmentioning

confidence: 99%

Sequential cutting of Urochloa brizantha cv. MG 5 changes flowering season and seed production components

et al. 2022

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In tropical grass seed production fields, reducing plant size can increase the solar radiation to the base of the plant canopy and improve the quantity and quality of the seeds produced. This research studied the responses of the production components, the productivity, and the seed quality of U. brizantha cv. MG-5 to different canopy sequential cuttings under cultivation conditions in rain fed systems. Two experiments were carried out (agricultural year 2015/16 (s1) and 2016/17 (s2)) in a randomized block experimental design with four repetitions. The treatments consisted of sequential cut-off, indicating the month of the last cut and the agricultural year: for the 2015/16 agricultural year: Aug - s1, Sep - s1, Oct - s1, Nov - s1, Dec - s1, Jan - s1, and Feb - s1; for the 2016/17 agricultural year: Aug - s2; Set - s2; Nov - s2; Dec - s2; Jan - s2, and Feb - s2. Plant growth biometrics, seed quality variables, and productivity were evaluated. The sequential cut strategy increased the productivity and quality of pure seeds when the final cuts were done between November and December. Cuts performed after December increased the reproductive components. However, in the region in question, rainfall levels compromised seed filling; and therefore productivity and quality since the flowering of these cuttings (January and February) occurs in May.

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“…Research has confirmed that tryptophan can increase IAA levels in plant tissues and ensure growth of various crops [20][21][22][23][24][25]. However, these studies have only considered germination under different conditions, without metabolic evaluations.…”

Section: Introductionmentioning

confidence: 99%

Effect of Exogenous Tryptophan on Primary Metabolism and Oxidative Stress and Their Relationship with Seedling Germination and Vigor of Glycine Max L.

et al. 2023

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Treatments that increase the germination potential and vigor of Glycine max seedlings are continuously being stimulated, with the aim of achieving a higher percentage of emergence and better performance in the field. Considering the relationship of tryptophan with germination-associated phytohormones, this study tested the hypothesis that exogenous supply of tryptophan to soybean seeds can affect germination, physiological vigor, and the accumulation of primary and oxidative metabolism molecules in seedlings. Soybean seeds were exposed to soaking solutions containing different concentrations of the amino acid (0, 25, 50, 100, and 200 µM), and the seedlings were evaluated at three time periods, at 8 h after sowing (HAS), and 5 and 14 days after sowing (DAS). Treated seeds showed better germination fitness and seedlings showed greater vigor, and these parameters increased with increasing concentrations of tryptophan. In the initial hours and days of germination process evaluation (14 HAS and 5 DAS), the activities of starch metabolism enzymes (α- and β-amylase) tended to be higher, resulting in increased contents of sucrose, reducing sugars, and total soluble solids at 8 DAS, constituting an important metabolic effect for seedling growth. On the other hand, the induction of germination and vigor promoted by exogenous tryptophan in soybean seedlings occurred by stimulating the metabolic pathways of oxidative stress, resulting in increased concentrations of H2O2, malondialdehyde, and proline in the tissues. Additionally, it led to increased activities of the antioxidant enzymes superoxide dismutase and ascorbate peroxidase. These parameters were responsive to increasing supplied concentrations of tryptophan. Thus, the metabolic stress in soybean seeds induced by auxin seems to be an important inductive pathway for germination and vigor of G. max seeds.

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Effect of chemical sprays and management practices on Brachiaria ruziziensis seed production

Cited by 8 publications

References 18 publications

The Effect of L-Tryptophan and Melatonin on Seed Germination of Some Cool Season Vegetable Species Under Salinity Stress

The Effect of L-Tryptophan and Melatonin on Seed Germination of Some Cool Season Vegetable Species Under Salinity Stress

Sequential cutting of Urochloa brizantha cv. MG 5 changes flowering season and seed production components

Effect of Exogenous Tryptophan on Primary Metabolism and Oxidative Stress and Their Relationship with Seedling Germination and Vigor of Glycine Max L.

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