Tillering of two wheat genotypes as affected by phosphorus levels

Fioreze, Samuel Luiz; Castoldi, Gustavo; Pivetta, Laércio Augusto; Fernandes, Dirceu Maxinimo; Büll, Leonardo Theodoro

doi:10.4025/actasciagron.v34i3.13326

Cited by 15 publications

(13 citation statements)

References 20 publications

(15 reference statements)

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“…It is noticed that plant growth, plant P concentration, total P uptake and P efficiency significantly differed between 2010 and 2011 season. Previous studies have shown that P nutrition could directly alter the pattern of tiller emergence and consequently influence the number of ears per unit of area, which plays an important role in wheat growth and yield potential ( Rodríguez et al, 1999 ; Fioreze et al, 2012 ). Higher P levels could increase wheat tiller emergence, survival and yield ( Fioreze et al, 2012 ).…”

Section: Discussionmentioning

confidence: 99%

Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field

et al. 2018

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Phosphorus (P) efficiency includes both P acquisition efficiency (PAE) and internal P utilization efficiency (PUE). Despite substantial research, genotypic variation in PAE and PUE remains incompletely understood in the field. A 2-year field study was conducted to compare PAE and PUE and related morphological, physiological, and molecular root traits of two winter wheat cultivars (Triticum aestivum L. cv. SJZ8 and KN92) in response to six P application rates in a P-deficient calcareous soil. Both cultivars showed similar growth and yield potential at each P supply level, reaching optimal growth at the same P application rate of about 100 kg P ha-1. However, the two cultivars differed in how they achieved yield and P efficiency. As P supply increased for both cultivars, root dry weight (RDW), root length density, and expression of the phosphate transporter gene TaPHT1.2 in roots initially increased and then stabilized, but arbuscular mycorrhizal fungal colonization, rhizosphere acid phosphatase activity, expressions of the P-starvation marker gene TaIPS1.1 and the purple acid phosphatase gene TaPAP16 in roots initially decreased and then stabilized. To enhance P acquisition when the P supply was deficient, KN92 modified the morphology of its roots, while SJZ8 increased the physiological activities in its roots. With an adequate P supply, high expression of TaPHT1.2 in roots might account for efficient P uptake for both cultivars, especially for KN92. Although P uptake per RDW was similar for both cultivars at anthesis, PAE was higher for KN92 than SJZ8 in terms of total P uptake in aboveground parts, whereas shoot and grain PUE were higher in SJZ8 than in KN92, mainly during the reproductive growth stage. These results indicate that P efficiency is under genotypic control at all P supply levels tested in both wheat cultivars, and that the two cultivars depend on different root strategies for P acquisition and utilization in response to changes in the P supply.

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Section: Discussionmentioning

confidence: 99%

Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field

et al. 2018

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“…The nutrition of grass with P is known to define the plantation yield, which has been suggested to be associated with plant development and tillering in sugarcane (Dillewijn, 1952, El-Tilib et al, 2004, wheat (Fioreze et al, 2012) and rice (Yoshida, 1981). In support of our hypothesis that the four sugarcane cultivars examined displayed differing plant and root morphologies, in our study, cultivars RB85-5156 and RB86-7515 showed high dependency on P availability for both biomass accumulation and tillering.…”

Section: Discussionmentioning

confidence: 99%

Biological and morphological traits of sugarcane roots in relation to phosphorus uptake

Arruda¹,

Rodrigues²,

Soltangheisi³

et al. 2016

J. Soil Sci. Plant Nutr.

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Appropriate management of phosphorus (P) in soil will lead to higher yields and sustainability for sugarcane production. Our study evaluated the importance of differences in root structure and function, and the differential composition of the bacterial community in four sugarcane cultivars, in relation to the efficiency for P uptake and also to assess changes in soil P with distance from the rhizoplane. Experiments were performed in pot trials using a sandy clay loam Ferralsol. In the first experiment, the effect of P application (78.4 mg P kg -1 soil astriple superphosphate) on sugarcane cultivars RB92-579; RB85-5156; RB86-7515 and RB96-6928 was investigated. Secondly, we evaluated P rates of 0; 9.8; 19.6; 39.2 and 78.4 mg kg -1 soil using cultivar RB96-6928 which was shown to be one of the more growth responsive cultivars. The cultivar RB96-6928 exhibited the highest root dry matter and root surface area, while the bacterial communities found in the rhizosphere of these plants were not different from other cultivars, as determined by PCR-DGGE. From the P dose-dependent experiment for this cultivar, optimal plant performance occurred at a P supply up to 38.5 mg P kg -1 soil. Collectively, our results indicate that P efficiency in sugarcane was predominantly associated with the generation of high root biomass and surface area.

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“…Highest number of nonproductive tillers m -2 were produced by control plots while lowest were found at 90 kg P ha -1 that is at par with 60 kg P ha -1 . Higher P rates enhanced tillers survival, emergence and yield, especially for secondary tillers [36]. Plant height (cm) Table 1 represents data regarding the effect of N, P and V on plant height.…”

Section: Non-productive Tillers M -2mentioning

confidence: 99%

Nitrogen and phosphorus fertilization of improved varieties for enhancing phenological traits of wheat

Anwar¹

2016

PAB

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A field experiment was conducted at New Developmental Farm, The University of Agriculture Peshawar during rabi 2012-2013 to study the effect of N and P fertilization of improved varieties for enhancing yield and yield components of wheat varieties. Randomized Complete Block (RCB) Design with split plot arrangement having three replications was used. A sub plot size of 12 m 2 having ten rows of 4 m length was used. N levels (100, 125 and 150 kg ha-1) and P levels (60, 90 and 120 kg ha-1) were applied to the main plots and wheat varieties (Siran-2010 and Atta-Habib) were assigned to the sub plots and one control having no N and P was maintained in main plot treatment. All of the phosphorus and half of the nitrogen were applied at sowing time. The remaining N was applied at tillering stage. The results of the experiment showed that maximum days to anthesis (137), days to maturity (167), number of leaves tiller-1 (6), leaf area tiller-1 (117 cm 2) and leaf area index (4.38) were produced by Siran-2010 while maximum plant height (98 cm) was maintained by Atta-Habib. Maximum leaf area index (4.64), were produced by 125 kg N ha-1 while nitrogen application at the rate of 150 kg ha-1 took maximum days to anthesis (140), days to maturity (170), number of leaves tiller-1 (6), leaf area tiller-1 (121 cm 2), non-productive tillers m-2 (19) and plant height (100 cm). Phosphorus application at the rate of 90 kg ha-1 produced highest leaves tiller-1 (6), leaf area tiller-1 (121 cm 2) and leaf area index (4.61). Phosphorus level of 120 kg ha-1 produced maximum non-productive tillers m-2 (19) and plant height (100 cm). Fewer days to anthesis (130) and maturity (160) were taken by control plots. It is concluded that wheat variety Siran-2010 produced better phonological traits when treated with 125 kg N ha-1 and 90 kg P ha-1 .

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Tillering of two wheat genotypes as affected by phosphorus levels

Cited by 15 publications

References 20 publications

Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field

Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field

Biological and morphological traits of sugarcane roots in relation to phosphorus uptake

Nitrogen and phosphorus fertilization of improved varieties for enhancing phenological traits of wheat

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