Effects of Plant Growth Regulators on Seed Filling, Endogenous Hormone Contents and Maize Production in Semiarid Regions

Ahmad, Irshad; Kamran, Muhammad; Meng, Xiangping; Ali, Shahzad; Bilegjargal, Bayasgalan; Cai, Tommaso; Liu, Tiening; Han, Qingfang

doi:10.1007/s00344-019-09949-2

Cited by 31 publications

(31 citation statements)

References 56 publications

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“…Kamran et al (2020) pointed out that the higher photosynthetic rate and duration (longer duration of green leaf area) were thought to be mainly responsible for grain yield increases after PAC treatment. Similar positive effects were obtained by application of UCZ, which improved maize grain yield by a higher kernel number per cob and an increased kernel weight due to enhanced seed filling (Ahmad et al, 2018(Ahmad et al, , 2019. These results are based on field experiments under semiarid conditions, where untreated maize plants faced water limitation during vegetation.…”

supporting

confidence: 62%

“…Less water demand and an improved WUE grain make the cultivation of PAC-treated plants suitable for drought-prone environments, as was shown under semiarid conditions (Ahmad et al, 2018(Ahmad et al, , 2019Ashraf et al, 2011;Kamran et al, 2018aKamran et al, , b, 2020. Triazoles such as PAC are considered as multi-stress protectants mitigating the negative effects of abiotic stresses (Fletcher et al, 2000).…”

Section: Consequences Of Less Water Consumption and Increased Water-use Efficiency After Pac Treatmentmentioning

confidence: 94%

“…In previous studies on the effects of inhibitors of gibberellin biosynthesis on maize grain yield, inconsistent results were obtained. Under semiarid conditions with frequently occurring water limitations, grain yield could be improved with PAC or UCZ application (Ahmad et al, 2018(Ahmad et al, , 2019;…”

Section: Possible Reasons For Reduced Grain Yield After Pac Treatmentmentioning

confidence: 99%

“…; Pioneer 1 mg a.i. with the untreated control plants (Ahmad et al, 2018(Ahmad et al, , 2019Kamran et al, 2018aKamran et al, , b, 2020. In these studies, it was argued that higher photosynthetic rates were responsible for yield improvements, although it is doubtful if this was really the limiting factor for grain development.…”

Section: Consequences Of Less Water Consumption and Increased Water-use Efficiency After Pac Treatmentmentioning

confidence: 99%

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Water‐use efficiency of maize may be increased by the plant growth regulator paclobutrazol

Hütsch

Schubert

2020

J Agronomy Crop Science

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supporting

confidence: 62%

Section: Consequences Of Less Water Consumption and Increased Water-use Efficiency After Pac Treatmentmentioning

confidence: 94%

Section: Possible Reasons For Reduced Grain Yield After Pac Treatmentmentioning

confidence: 99%

Section: Consequences Of Less Water Consumption and Increased Water-use Efficiency After Pac Treatmentmentioning

confidence: 99%

See 2 more Smart Citations

Water‐use efficiency of maize may be increased by the plant growth regulator paclobutrazol

Hütsch

Schubert

2020

J Agronomy Crop Science

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“…The accumulation of abscisic acid and cytokinins correlated positively with the rate of grain filling. The use of the triazole derivative of uniqueosole retardant was more effective than the ethylene product of ethephone (Ahmad et al, 2019).…”

Section: Introductionmentioning

confidence: 95%

Morphogenesis, pigment content, phytohormones and productivity of eggplants under the action of gibberellin and tebuconazole

Rogach

Voytenko

Shcherbatiuk

et al. 2020

Regul. Mech. Biosyst.

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Regulation of growth and development of cultivated plants in order to optimize the production process is one of the main objectives of modern plant physiology. Both activators and growth inhibitors are used for this purpose. The effect of foliar treatment with 0.005% solution of gibberellic acid and 0.025% solution of antigibberellic preparation of tebuconazole on the morphogenesis, leaf structure, photosynthetic pigment content, balance of phytohormones and eggplant productivity cv. Diamond variety was investigated. The treatment with the preparations was carried out in the budding phase. The vegetation experiment was laid under soil and sand culture in vessels of a ten-liter capacity. The morphometric parameters were determined every 10 days, the mesostructure was studied in the leaves of the middle tier in the phase of fruit formation, chlorophyll content was measured in the raw material by spectrophotometric method. Analytical determination of phytohormones (indole-3-acetic acid, gibberellic, abscisic acids and cytokinins – zeatin, zeatin-O-glucoside, zeatinriboside, isopentenyladenine and isopentenyladenosine) was performed by high performance liquid chromatography. Under the action of gibberellic acid, plant height increased significantly, and it decreased after its treatment with tebuconazole. The stimulator and inhibitor increased the number of leaves per plant, the weight of the leaf dry matter, the area of the individual leaf blade and the area of leaves per plant. Both preparations increased the weight of the raw material of the stems and roots, as well as the mass of dry matter of the whole plant. Under the action of tebuconazole, the content of chlorophylls in the leaves increased, while under the action of gibberellic acid it decreased. After treatment with gibberellic acid and tebuconazole, the thickness of the leaf blade increased due to chlorenchyma thickening. In the variant with gibberellic acid, the thickness of upper and lower epidermis increased, and in the variant with tebuconazole, these parameters decreased. Both growth regulators increased the volume of cells of the columnar parenchyma. The contet of endogenous gibberellic, indole-3-acetic and abscisic acids of the stems and especially in the leaves increased with the treatment of exogenous gibberellic acid, whereas after the application of tebuconazole the gibberellic and indole-3-acetic acid content of the stems decreased significantly and practically decreased to traces. Instead, the amount of abscisic acid increased. After treatment with exogenous gibberellic acid, the pool of cytokinins in the leaves significantly decreased. The inactive isoforms of the hormone zeatin-O-glucoside and isopentenyladenosine dominated in the stems. The effect of tebuconazole decreased the pool of cytokinins in the stems and increased in the leaves. In general, due to the multidirectional action, growth regulators positively influenced the elements of eggplant productivity. More effective was the retardant – tebuconazole. Therefore, the anatomic-morphological and structural-functional rearrangements in eggplants under the effects of exogenous gibberellic acid and tebuconazole are due to changes in the balance and distribution of endogenous hormones. Increased photosynthetic activity, stimulation of growth processes of some organs of the plant and inhibition of others enlarged the biological productivity of the culture.

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The physicochemical approaches of altering growth and biochemical properties of medicinal plants in saline soils

Miransari¹,

Adham²,

Miransari³

et al. 2022

Appl Microbiol Biotechnol

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Effects of Plant Growth Regulators on Seed Filling, Endogenous Hormone Contents and Maize Production in Semiarid Regions

Cited by 31 publications

References 56 publications

Water‐use efficiency of maize may be increased by the plant growth regulator paclobutrazol

Water‐use efficiency of maize may be increased by the plant growth regulator paclobutrazol

Morphogenesis, pigment content, phytohormones and productivity of eggplants under the action of gibberellin and tebuconazole

The physicochemical approaches of altering growth and biochemical properties of medicinal plants in saline soils

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