Physiological quality of dual-purpose wheat seeds from plants subjected to artificial defoliation

Rodolfo, Giselle Regina; Souza, Clóvis Arruda; Coelho, Cileide Maria Medeiros; Belizário, Karla Katy

doi:10.1590/0103-8478cr20151582

Cited by 7 publications

(11 citation statements)

References 6 publications

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“…Taken together, the results indicate sensitivity in the reproductive stage of wheat plants to define seed vigor due light restriction. Similar to results obtained by Rodolfo et al (2017), who found no effects on the germination of the seeds produced, but there was a reduction in vigor, probably due to the lower content of carbohydrates (starch) in the seeds, by limiting the source-sink relationship of wheat plants, manipulating the source factor through defoliation between the tillering and booting stages. Thus, in the stages that precede the anthesis, the formation of floral structures occurs (Marcos Filho, 2015), later double fertilization, that is, the union of the nuclei spermatic (n) with the oosphere (n) and the polar nuclei (2n), to then start cell division, growth of the zygote (2n) and the reserve tissue, the endosperm (3n) (Berger, 2003).…”

Section: /8supporting

confidence: 86%

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Physiological potential of wheat seeds produced under light restriction

Cigel

Souza

Kandler

et al. 2021

Agraria

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The low radiation intensity can negatively affect the production of photoassimilates in plants for allocation and synthesis of reserves into seeds. This study aimed to evaluate the physiological quality of wheat seeds produced by plants imposed on conditions of light reduction in different phenological stages, remaining until the end of the cycle. The experiment was carried out in a greenhouse in 2018, with a completely randomized design, with 11 treatments and 20 repetitions. The treatments consisted of 11 seed lots: 10 of plants grown in artificial shade (70%) started in the Zadoks code's phenological stages: 23; 30; 35; 45; 55; 60; 65; 70; 75; 80 and control lot (without shading). The seeds were analyzed for germination and vigor. Seed germination was not affected. There was a reduction in vigor through the tests of accelerated and cold aging when the shading started between stages 55 and 65, but with a minimum vigor of 93 and 94%, respectively. It is concluded that the restriction of light during the development of wheat plants does not affect the germination of the seeds produced but impairs the vigor mainly when imposed in the reproductive phases.

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Section: /8supporting

confidence: 86%

“…However, the less vigorous lots reached a minimum of 93% in the AA. More intense reductions in seed vigor by the AA test were observed for wheat cultivars BRS Umbu and BRS Tarumã when submitted to defoliation, in which the minimum percentage in AA was 46% and 49%, respectively (Rodolfo et al, 2017), due to greater photosynthetic limitation.…”

Section: /8mentioning

confidence: 89%

Physiological potential of wheat seeds produced under light restriction

Cigel

Souza

Kandler

et al. 2021

Agraria

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“…Similarly, germination also has favorable results when defoliation on the plant is performed during tillering, that is, at the beginning of the vegetative period, as the restriction of sugars in this period does not alter the seeds' formation. (RODOLFO et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies

et al. 2022

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This study determined the effect of different defoliation frequencies in a long-cycle ryegrass cultivar on yield components and the physiological and sanitary quality of seeds. Four defoliation frequencies were applied (without, one, two, and three defoliations). The time between defoliations was 350 degree-days. At the first, second, and third defoliation time, the plants were 15 cm, 20 cm, and 35 cm, respectively, and were lowered to half their height. The yield components and plant structure were evaluated through the tillers, along with the physiological quality of the seeds, which was verified by germination tests, first germination count, accelerated aging, tetrazolium test, field emergence, and weight of a thousand seeds. For the sanitary quality analysis, the percentage (%) of fungi incidence in the seeds was verified. The second defoliation determined the seeds’ high physiological and sanitary quality due to the higher amount of primary and secondary tillers produced concerning the other treatments. However, there was no significant difference for the third defoliation since the aerial tillers issued the same quality of seeds originated from primary and secondary tillers. The average incidence of fungi such as Colletotrichum sp., Fusarium sp., Phoma sp., and Dreshslera spp. was lower in ryegrass plants subjected to three defoliations.

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“…Dual-purpose wheat genotypes show high phytomass yield, a long vegetative phase, tolerance to trampling, high tillering potential and fast establishment, as well as forage and grain production (Martin et al, 2010;Szareski et al, 2016a;Carvalho et al, 2016a). This type of wheat is grown in several countries, including the United States of America, Uruguay and Argentina (Fontaneli, 2007;Hastenpflug, 2009;Kavalco et al, 2017). Research shows bromatological characteristics with crude protein around 27% and 69% total digestible nutrients (Hastenpflug et al, 2011;Carvalho et al, 2016b;Silveira et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Research Article Predictor model and canonical interrelationships based on morphological, bromatological and grain yield characteristics of dual purpose wheat

Silva¹,

Carvalho²,

Szareski³

et al. 2019

Genet. Mol. Res.

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We evaluated correlations between yield, meteorological and bromatological characters in five genotypes of dual-purpose wheat submitted to different cutting management systems. The experiments were carried out in 2014 and 2015. The experimental design was a randomized block, organized in a factorial scheme, with five genotypes of dual purpose wheat (BRS Tarumã, BRS Umbu, BRS Figueira, BRS Guatambu and BRS 277), three cutting managements (one, two and three cuts), with three replicates. The data of each cut management were submitted to linear correlation analysis, canonical correlations and stepwise predictions . We conclude that yield and bromatological components of the forage are closely related to the meteorological attributes and cut management. Neutral and acid detergent fiber, hemicellulose, mineral matter and total carbohydrates are influenced by maximum and minimum air temperature, as well as by incident solar radiation. The canonical interrelationships and the predictive models developed for the morphological, bromatological and grain yield attributes are specifically dependent on cut management in dual purpose wheat. ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 18 (2): gmr18302 F.L. da Silva et al. 2

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Physiological quality of dual-purpose wheat seeds from plants subjected to artificial defoliation

Abstract: Defoliation may play a role in source-

Cited by 7 publications

References 6 publications

Physiological potential of wheat seeds produced under light restriction

Physiological potential of wheat seeds produced under light restriction

Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies

Research Article Predictor model and canonical interrelationships based on morphological, bromatological and grain yield characteristics of dual purpose wheat

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