Application of Plant Growth Regulators on Soft White Winter Wheat under Different Nitrogen Fertilizer Scenarios in Irrigated Fields

Qin, Ruijun; Noulas, Christos; Wysocki, Don; Wang, Guojie; Lukas, Scott B.

doi:10.3390/agriculture10070305

Cited by 22 publications

(13 citation statements)

References 32 publications

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“…Plant lodging often reduces crop yield because it limits the translocation of photoassimilates to grain development, increases the risk of foliar diseases and grain sprouting and causes harvest delay (Berry et al, 2004;Penckowski et al, 2009). The use of plant growth regulators is a practice widely adopted in wheat farm operations in the hope of reducing plant lodging that usually reduces grain quality and yield (Peake et al, 2020;Qin et al, 2020). Plant growth regulators are synthetic hormonal substances sprayed on the crop to reduce plant height, aiming to decrease the risk of lodging (Fagerness and Penner, 1998;Matysiak, 2006;Qin et al, 2020) by decreasing the leverage applied to the base of the stem during wind events (Berry et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and trinexapac-ethyl effects on wheat grain yield, lodging and seed physiological quality in southern Brazil

Faria¹,

Silva

Lollato

2022

Ex. Agric.

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Summary Nitrogen (N) fertilization affects wheat yield and grain protein concentration; however, its mismanagement can increase plant lodging. While the use of plant growth regulators such as trinexapac-ethyl (TE) can mitigate plant lodging, their effects on seed physiological quality are not well known. The aim of this study was to evaluate the effects of N fertilization and TE on wheat yield, lodging and seed quality of spring wheat varieties. It was carried out in the 2018 growing season in the environments of Londrina and Ponta Grossa, Brazil. A randomized complete block design was used with a 2 × 3 × 3 factorial arrangement to evaluate two wheat genotypes (WT 15008 and WT 15025), three top-dressing N rates (0, 40 and 120 kg ha−1), and three TE rates (0, 50 and 100 g ha−1). Agronomic characteristics related to wheat productivity (hectolitre weight, thousand-grain weight, density of fertile spikes, plant height, lodging and grain yield) and seed physiological quality (seed germination and vigour; length and dry matter of normal seedlings) were evaluated. Increasing N rates up to 120 kg ha−1 increased plant lodging up to 26.4 percentage points for WT 15025 in Londrina. TE impaired some traits of seed physiological quality. Spraying 100 g ha−1 TE on the plants reduced seedling length by 9.4% in the seeds of WT 15008 harvested in Ponta Grossa compared to the TE control (0 g ha−1). The dry matter of the seedlings from the seeds harvested in Londrina declined by 7.2% due to the application of 100 g ha−1 TE, compared to the control. However, a lower rate of TE (50 g ha−1) might be enough to minimize plant lodging without impairing the physiological quality of the seeds, depending on the rate of N fertilization. This study is the first step in providing empirical evidence for the detrimental effects of TE in combination with N on wheat seed quality, suggesting that seed producers should exercise caution in managing TE and N fertilization.

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Section: Introductionmentioning

confidence: 99%

Nitrogen and trinexapac-ethyl effects on wheat grain yield, lodging and seed physiological quality in southern Brazil

Faria¹,

Silva

Lollato

2022

Ex. Agric.

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“…У науковій літературі поки ще обмаль даних щодо генотипних відмінностей дії регуляторів росту у пшениці. Зокрема, встановлено, що за кількох способів обробки рослин хлормекватхлоридом та тринексапак-етилом високорослого сорту ORCH-102 білої м'якої озимої пшениці врожайність зростала на 1,5-2,5 т/га, а вміст білка в зерні на 4-5 %, а у низькорослого сорту SY Ovation -дещо менше: на 2,5-3,5 т/га та на 3-4% відповідно [3]. Водночас застосування регуляторів росту однаково зменшувало висоту рослин (на 0,6-1 дюйма) як у сорту з більшою міцністю соломини (WB-Grainfield), так із меншою (1863) та не вплинуло на врожайність [11].…”

Section: результати та обговоренняunclassified

“…Вважають також, що регулятори росту можуть сприяти адаптації рослин до конкретних умов вирощування [1]. У науковій літературі частіше висвітлені такі аспекти дії стимуляторів росту, як вплив на висоту рослин, швидкість росту, якість продукції, захист від хвороб [2,3]. Водночас генотипні особливості їх впливу досліджено менше.…”

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Estimation of genotypic features of effects of plant treatment with growth regulators on canopy parameters and yield of winter wheat

Priadkina¹,

Стасик²,

Makharinska³

et al. 2021

Fakt. eksp. evol. org.

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Aim. A study of the effects of growth regulators derived from natural raw materials on the photosynthetic apparatus surface and the yield of winter wheat. Methods. Morphometric, spectrophotometric, statistical. Results. An increase in the value of canopy chlorophyll index (ChlI) of Smuhlianka and Astarta varieties under the treatment of plants with Stimpo growth stimulator was established at anthesis, a positive effect of the regulator Regoplant – only for Smuhlianka variety at milk-wax ripeness. Chlorophyll photosynthetic potential (ChlP) during the period anthesis – milk-wax ripeness increased significantly under the use of growth regulators in both varieties, while the efficiency of treatments had varietal differences: growth was greater (11–18% compared to control) in the variety Smuhlianka than in the variety Astarta (6–7%). A positive correlation was established between the yield and ChlP during the period anthesis – milk-wax ripeness. Under the action of treatment of plants with growth regulators, the increase in grain yield was significant (0.29–0.45 t/ha) only in the variety Smuhlianka. Conclusions. The positive effect of treatments of plants with growth regulators, obtained from natural raw materials, on the value of canopy ChlI at anthesis and ChlP during period anthesis – milk-wax ripeness was established. A positive correlation between the winter wheat yield and ChlP during the period anthesis – milk-wax ripeness was found. Varietal differences in the effect of growth regulators treatment of plants on ChlP and yield were found. Keywords: Triticum aestivum L., grain productivity, chlorophyll index, chlorophyll photosynthetic potential, growth regulator.

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“…For example, the treatment of rice crops with growth regulator trinexapac-ethyl caused a decrease in plant height and the lodging degree, and a larger crop yield as a result (Corbin et al, 2016). Similarly, in the soft white winter wheat crops, growth-regulating compounds chlormequat chloride-CC and trinexapacethyl-TE eliminated crop lodging and yield losses, reducing linear plant growth (Qin et al, 2020). According to recent research, a decrease in grain crops stem lodging is due to the appearance of a greater strength of the plants' structural parts and correlates with change in chemical composition of the cell walls, including the lignin content (Begović et al, 2018;Heuschele et al, 2020;Huang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Altering maize (Zea mays) seedlings’ growth and lignification processes by action of novel synthesized compounds

Lykholat

Хромых

Дідур

et al. 2021

Regul. Mech. Biosyst.

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Effective management of the course of crop vegetation and adaptation to biotic and abiotic stresses is a prerequisite for stable grain production and requires replenishment of the arsenal of plant growth regulators. The effect of novel synthesized cage amides on maize seedlings morphogenesis has been tested. Seeds of a mid-early maize hybrid 'DN Galatea' after the pre-sowing treatment with 0.01% solutions of test compounds were grown in distilled water. The roots and shoots sections of 10-day-old maize seedlings were stained with phloroglucinol solution to reveal the lignin-containing anatomical structures. The effects of nine different test compounds, exceeding the well-known effects of the phytohormone auxin, promoted the maize seedlings’ linear growth, increased wet weight of roots and shoots, and dry biomass accumulation both in seedlings roots and shoots. Several test compounds activated the dry weight accumulation process without significantly affecting the root and shoot length. In the maize seedlings’ roots, an increase in the diameter and number of the xylem vessels was found, as well as an increase in the lignin-containing layer thickness of the endoderm cells in the root cortex. In the maize seedlings’ shoots, the test compounds caused an increase in the thickness of the lignin-containing outer layer of the seedlings’ first leaf. In general, the test compounds’ effect on seedling roots can potentially enhance root formation; increase efficiency of the roots water-conducting system and the tissues’ strength, thus reducing the likelihood of root lodging in maize plants. The effects of the test compounds revealed in the seedlings’ shoots reflect the activation of the shoots’ structure formation and may have a positive value for enhancing the strength of the plant stems and counteracting the stem lodging of the maize plants.

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Application of Plant Growth Regulators on Soft White Winter Wheat under Different Nitrogen Fertilizer Scenarios in Irrigated Fields

Cited by 22 publications

References 32 publications

Nitrogen and trinexapac-ethyl effects on wheat grain yield, lodging and seed physiological quality in southern Brazil

Nitrogen and trinexapac-ethyl effects on wheat grain yield, lodging and seed physiological quality in southern Brazil

Estimation of genotypic features of effects of plant treatment with growth regulators on canopy parameters and yield of winter wheat

Altering maize (Zea mays) seedlings’ growth and lignification processes by action of novel synthesized compounds

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