Plant growth analysis and seed vigor expression: effects of soil waterlogging during rye plant development

Pedó, Tiago; Martinazzo, Emanuela Garbin; Aumonde, Tiago Zanatta; Villela, Francisco Amaral

doi:10.1590/0102-33062014abb3574

Cited by 15 publications

(14 citation statements)

References 19 publications

(21 reference statements)

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“…Plants at 75% N had higher Ct than plants under 100%, 50% and 25% N, showing greater efficiency in the increase of dry matter per unit area in relation to time. Similar trends were found by Pedó et al [24] in rye plants and by Koch et al [25] in wheat.…”

Section: Resultssupporting

confidence: 91%

“…In this sense, the highest Ea are related to the increase of the efficiency of the leaf area for photoassimilate production, with the second Ea peak being due to the emergence of the plant reproductive structures [30]. Ea curves showing two peaks during plant ontogeny have been described by Silva et al [31] in barley, Falqueto et al [32] in rice and Pedó et al [24] in rye.…”

Section: Das (Figure 2(c)) the Maximum Values Of Rw Were Obtained Bymentioning

confidence: 90%

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Nitrogen Fertilization on Maize Sowing: Plant Growth and Seed Vigor

Troyjack¹,

Pimentel²,

Padilha³

et al. 2018

AJPS

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The management of fertilization in maize plants is a preponderant factor in the search for higher yields and obtaining quality seeds. In this sense, the study of nitrogen (N) management is predominant in improving the efficiency of its application. The objective of this study was to evaluate the growth, partition assimilation and vigor expression of maize seeds submitted at different doses of nitrogen applied at sowing. The treatments were constituted by different doses of nitrogen fertilization at sowing, being: 25%, 50%, 75% and 100% of the recommended dose for the crop, according to the recommendation of nitrogen fertilization. The plants were collected at regular intervals of 21 days after sowing until the end of the growth cycle. For the analysis of growth and partition of dry matter between the organs, the accumulation of dry matter and leaf area was measured. The experimental design was randomized blocks in a 4 × 7 factorial scheme (four N rates at sowing and seven collection times with three replications). The maize plants under the influence of nitrogen fertilization at sowing presented differential growth and distinct responses in the assimilated partition between their structures, with the intensity dependent on the dose used. Plants grown using 75% of the recommended dose of N at sowing had a higher relative growth rate, with more pronounced effects compared to the other doses. The expression of maize seed vigor increases to an increase of 82.5% N at sowing.

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Section: Resultssupporting

confidence: 91%

Section: Das (Figure 2(c)) the Maximum Values Of Rw Were Obtained Bymentioning

confidence: 90%

Nitrogen Fertilization on Maize Sowing: Plant Growth and Seed Vigor

Troyjack¹,

Pimentel²,

Padilha³

et al. 2018

AJPS

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“…part of the leaf area of the plant is constituted by young leaves, with a high photosynthetic capacity and high growth rate (Aumonde et al, 2011). In another way, the decrease of R w is related to the gradual increase of the non-photosynthetic tissues, due to the elevation of the respiratory activity and the auto shading (Pedó et al, 2015). The net assimilation rate (E a ), as expected, presented two peaks of maximum production of assimilates through the ontogeny of plants (Figure 1f).…”

Section: Resultssupporting

confidence: 61%

Growth of Wheat Plants Submitted to the Application of the Growth Regulator Trinexapac-ethyl and Vigor of the Produced Seeds

Koch¹,

Aisenberg²,

Monteiro³

et al. 2017

Agrociencia

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The use of growth regulators in wheat aims to reduce problems caused by the lodging of plants. The aim of this study was to evaluate the growth and vigor expression of wheat seeds treated with a growth regulator and the fertilization of plants to achieve high yields. The cultivar used was OR Topázio, the treatments consisted of the combination of five rates of the trinexapac-ethyl [0-no application; 200; 400; 600 e 800 mL of the commercial product ha-1 ] and eight harvesting dates [14, 28, 42, 56, 70, 84, 98 e 112 days after emergence ]. The experimental design was completely randomized, in a factorial scheme 5 x 8 (five rates and eight harvest dates) with four repetitions. The total dry matter, dry matter production rate, relative growth rate, net assimilation rate, conversion efficiency of solar energy, photoassimilate partition, harvest index, and seedling emergence index were evaluated. Allocation of total dry matter, relative growth rate, plant height and harvest index were reduced by the growth regulator, with varied intensity according to the rate applied. The net assimilation rate was reduced in plants subjected to 400, 600 and 800 mL ha-1. The seedling emergence and the speed of emergence index were not affected by the action of the growth regulator.

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“…The high values noted at the beginning of the plant cycle may be explained by the fact that the leaf area was primarily constituted by young leaves, which have a high photosynthetic capacity and growth rate (AUMONDE et al, 2011). In contrast, the reduction of R w values during the plant cycle was related to the gradual increase of nonphotosynthetic tissues, due to increased respiratory activity and self-shading (PEDÓ et al, 2015).…”

Section: Figurementioning

confidence: 83%

“…The increases in the values of the dry-mass production rate are related to the foliar increase, the amount of photoassimilates synthesized, and their distribution among the different organs of the plants (LOPES; LIMA, 2015). On the other hand, the reduction in the rates of dry-mass production may be related to the increase of the self-shading, non-photosynthetic tissues, and increase in leaf senescence (PEDÓ et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Ecophysiological responses of dual-purpose wheat originating from different cutting management systems

Koch

Carvalho

Szareski

et al. 2017

SCA

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Wheat is one of the most cultivated cereals worldwide. Some wheat genotypes may be used for dual purposes that is, in the production of animal fodder and grains. The objective of this study was to compare the growth, partitioning of assimilates, and seed vigor expression of dual-purpose wheat cultivars originating from seeds produced by plants subjected to different cutting management systems. Dual-purpose wheat seeds in the vegetative period were used for this study; these were obtained from the cultivar BRS Umbu produced by plants subjected to different cutting management systems. The experimental design was completely randomized in a factorial scheme, with four replications. The treatments comprised a combination of four seed production systems (one, two, and three cuts) and eight planting seasons (10, 20, 30, 40, 50, 60, 70, and 80 days after emergence [DAE]). Total dry-mass, drymass production rate, relative growth rate, net assimilation rate, leaf area index, solar energy conversion efficiency, dry-mass partitioning, seedling emergence in the field, and emergence speed index were evaluated. Data regarding seedling emergence and emergence speed index were adjusted by orthogonal polynomials. Primary growth data were evaluated from the simple logistic equation. From 60 DAE, an inversion of the values of total dry-mass was observed, and the maximum values were observed in plants from seeds produced without cutting management. The highest dry-mass production rates were noted for plants produced by seeds of plants not subjected to cutting management. The highest relative growth rates were noted among plants originating from seeds produced by plants subjected to three-and two-cut treatments. The net assimilation rate was higher in plants originating from seeds produced from plants subjected to cutting management systems. The highest values of emergence were observed for seeds obtained from the three-cut treatment. Similarly, an increase in the values of emergence speed index was observed in seeds from plants subjected to one-cut treatment. Dual-purpose wheat cultivars originating from seeds produced in the absence of cutting management presented higher total dry-mass, dry-mass production rate, and relative growth rate. The net assimilation rate was higher in plants from seeds produced with cutting management systems. Plants produced from seeds subjected to the threecut production management resulted in more vigorous seeds.

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Plant growth analysis and seed vigor expression: effects of soil waterlogging during rye plant development

Cited by 15 publications

References 19 publications

Nitrogen Fertilization on Maize Sowing: Plant Growth and Seed Vigor

Nitrogen Fertilization on Maize Sowing: Plant Growth and Seed Vigor

Growth of Wheat Plants Submitted to the Application of the Growth Regulator Trinexapac-ethyl and Vigor of the Produced Seeds

Ecophysiological responses of dual-purpose wheat originating from different cutting management systems

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