Plant growth regulators on sweet sorghum: physiological and nutritional value analysis

Abstract

Sweet sorghum has gained attention in tropical and subtropical regions because of its potential as a bioenergy crop. The present research was carried out to evaluate the physiological, biochemical and nutritional characteristics of sweet sorghum submitted to six plant growth regulators (thiamethoxam, biostimulant mixture, gibberellic acid, chlormequat chloride, ethephon, and trinexapac-ethyl). The compounds were applied via foliar spraying in order to increase the productive potential of plants and reduce the carbohydrates sink strength by inflorescences. The experiment was conducted in pots and the following variables were evaluated: plant height, inflorescence dry matter, soluble solids content, shoot dry matter, crude protein, ashes, neutral detergent fiber and in vitro digestibility. It were observed the action of trinexapac-ethyl and ethephon to reduce the inflorescence dry matter, chlormequat chloride to increase the shoot dry matter, and trinexapac-ethyl to improve ashes content and reduce the neutral detergent fiber contents. These results indicate that chlormequat chloride and trinexapacethyl are effective in restricting the plant growth and increasing sorghum nutritional quality.Keywords: Sorghum bicolor, plant growth, plant nutritional quality, bioenergy Reguladores vegetais em sorgo sacarino: análises fisiológicas e de qualidade nutricional ResumoO sorgo sacarino tem ganhado atenção em regiões tropicais e subtropicais devido ao seu potencial uso como cultivo bioenergético. Nosso estudo avaliou as características fisiológicas, bioquímicas e nutricionais do sorgo sacarino submetido a seis reguladores vegetais (thiamethoxam, mistura bioestimulante, ácido giberélico, cloreto de clormequat, etefon e etil-trinexapac). Os compostos foram aplicados via pulverização foliar, no intuito de avaliar o potencial aumento na produção das plantas, bem como reduzir a força do dreno de carboidratos promovida pelas inflorescências. O experimento foi conduzido em vasos, onde avaliaram-se as seguintes variáveis: altura de planta, massa seca das inflorescências, conteúdo de sólidos solúveis, massa seca da parte aérea, proteína bruta, cinzas, fibra em detergente neutro e digestibilidade in vitro. Entre os reguladores de crescimento testados, foi observada a ação do etil-trinexapac e do etefon na redução da matéria seca da inflorescência, do cloreto de clormequat no ganho de matéria seca da parte aérea e do etil-trinexapac para incrementar o teor de cinzas e reduzir a fibra em detergente neutro. Estes resultados indicam que o cloreto de clormequat e o etil-trinexapac são eficazes na restrição do crescimento e melhoria da qualidade nutricional do sorgo.Palavras chave: Sorghum bicolor, crescimento vegetal, qualidade nutricional, bioenergia

Improving Nutritive Value of Native Warm‐Season Grasses with the Plant Growth Regulator Trinexapac‐Ethyl

“…Reductions in BBIG fiber content (NDF) and greater digestible content (IVTDMD) were also observed, indicating alterations beyond potentially delayed senescence. Measurements of perennial forage grass nutritive response to TE has not been documented before, but results were consistent with reports of overall reductions in NDF in pearl millet treated with mefluidide and sorghum treated with TE (Redmon et al, 2003;Macedo et al, 2017).…”

“…ha -1 ) and three concentrations of trinexapac-ethyl (TE) across three sampling months (Aug.-Oct.) and 2 yr for a mixture of big bluestem (Andropogon gerardii)/indiangrass (Sorghastrum nutans) and switchgrass (Panicum virgatum). improved digestibility (Redmon et al, 2003;Macedo et al, 2017). However, no improvements were found in stem nutritive value for either species (Table 4).…”

The influence of weather conditions on bioactive compound content in sorghum grain

“…Sorghum (Sorghum Moench), which belongs to the family of Poaceae, is an annual plant with C4 photosynthesis cycle [1,2]. It is the fifth most important cereal in the world in terms of the cropped area [3,4], because it is considered to be one of high nutritional value food crops [5][6][7][8][9]. The varieties of primary economic importance are Sorghum bicolor L. and Sorghum sudanense L., as well as numerous hybrids [10][11][12], which are also valuable animal fodder [13][14][15][16].…”

Conventional and Nonconventional Methods of Synthesis and Growth-Stimulating Activity of 3-Chloro-N,n-Diethyl-N-(2-(Mesitylamino)-2-Oxoethyl)propan-1-Aminium Iodide

“…IR (КBr), сm -1 : 3183 (N-Н) 1691 (С=О аmіdе), 1473 (С aromatic =С aromatic ). 13 -16 2013-16 , Каz-20 2013-16 , Victoria-4 2014, Black top 2015, Hybrid 1 2015. For this goal, 10 -2 and 10 -3 % (by mass) solutions were prepared with the synthesized ionic compound.…”

“…To stimulate germination and increase the productivity of sorghum different growth regulators as gibberellic acid, ethephon and chlormequat are used [13].…”