Barley genotypes with long root hairs sustain high grain yields in low-P field

Gahoonia, Tara Singh; Nielsen, Niels Erik

doi:10.1023/b:plso.0000037020.58002.ac

Cited by 207 publications

(128 citation statements)

References 32 publications

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“…It is unrealistic to make any straightforward comment that grain yield is directly related to a particular trait only, but in previous studies root hair length was related to grain yield stability [33]. PC2 revealed that root surface area reduction due to treatment effect had a positive association with root hair length and diameter.…”

Section: Trait Association: Root Traits With Panicle Traitsmentioning

confidence: 97%

Polyethylene Glycol (PEG)-Treated Hydroponic Culture Reduces Length and Diameter of Root Hairs of Wheat Varieties

2015

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Abstract:Wheat is an important cereal crop worldwide that often suffers from moisture deficits at the reproductive stage. Polyethylene glycol (PEG)-treated hydroponic conditions create negative osmotic potential which is compared with moisture deficit stress. An experiment was conducted in a growth chamber to study the effects of PEG on root hair morphology and associated traits of wheat varieties. Plants of 13 wheat varieties were grown hydroponically and three different doses of PEG 6000 (w/v): 0% (control), 0.3% and 0.6% (less than −1 bar) were imposed on 60 days after sowing for 20 days' duration. A low PEG concentration was imposed to observe how initial low moisture stress might affect root hair development. PEG-treated hydroponic culture significantly decreased root hair diameter and length. Estimated surface area reduction of root hairs at the main axes of wheat plants was around nine times at the 0.6% PEG level compared to the control plants. Decrease in root hair diameter and length under PEG-induced culture decreased "potential" root surface area per unit length of main root axis. A negative association between panicle traits, length and dry weight and the main axis length of young roots indicated competition for carbon during their development. Data provides insight into how a low PEG level might alter root hair development.

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Section: Trait Association: Root Traits With Panicle Traitsmentioning

confidence: 97%

Polyethylene Glycol (PEG)-Treated Hydroponic Culture Reduces Length and Diameter of Root Hairs of Wheat Varieties

2015

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“…Also the development of 'proteoid' roots, special structures in certain plant families that release large amounts of organic acids, has been attributed to P-deficiency (Adams et al, 2002). Another adaptive strategy in response to P deficiency is increased root hair length and density, which increases total root surface area at minimal carbon cost to improve P uptake (Ma et al, 2001;Lynch and Brown, 2001;Gahoonia and Nielsen, 2003;Gahoonia and Nielsen, 2004). In comparison to the structural adaptations listed above, an even more carbon-efficient strategy to acquire higher amounts of P is to promote mycorrhizal symbioses (Pandey et al, 2005a).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Physiological and molecular alterations in plants exposed to high [CO2] under phosphorus stress

Pandey

Zinta

AbdElgawad

et al. 2015

Biotechnology Advances

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Physiological and molecular alterations in plants exposed to high [CO 2 ] under phosphorus stress, Biotechnology Advances (2015Advances ( ), doi: 10.1016Advances ( /j.biotechadv.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. This is the author's version of a work that was accepted for publication in Biotechnology Advances (Ed. Elsevier). Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Pandey, Renu et al. Fax: +91-11-25846420] has increased substantially in recent decades and will continue to do so, whereas the availability of phosphorus (P) is limited and unlikely to increase in the future. P is a non-renewable resource, and it is essential to every form of life. P is a key plant nutrient controlling the responsiveness of photosynthesis to [CO 2 ]. Increases in [CO 2 ] typically results in increased biomass through stimulation of net photosynthesis, and hence enhance the demand for P uptake. However, most soils contain low concentrations of available P.Therefore, low P is one of the major growth-limiting factors for plants in many agricultural and natural ecosystems. The adaptive responses of plants to [CO 2 ] and P availability encompass alterations at morphological, physiological, biochemical and molecular levels. In general low P reduces growth, whereas high [CO 2 ] enhances it particularly in C 3 plants. Photosynthetic capacity is often enhanced under high [CO

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“…The differences in genotypes to grow in P limited soils have been reported in several crops such as wheat (Gahoonia et al, 1999;Osborne and Rengel, 2002;Ozturk et al, 2005), maize (Hussein, 2009) and common bean (Fageria et al, 2010) which may be due to differences in changing rhizosphere pH, release of organic compounds, root surface area (Lynch and Brown, 2001;Gahoonia and Nielsen, 2004), production and secretion of phosphatase enzymes by the roots (Yun and Kaeppler, 2001;Wasaki et al, 2003) and use of acquired P in dry matter production (Fohse et al, 1988;Clark and Duncan, 1991). The present experiment was conducted to determine grain yield and yield components and agronomic efficiency of common bean varieties at different P rates.…”

Section: Introductionmentioning

confidence: 98%

Effect of Phosphorus Application and Varieties on Grain Yield and Yield Components of Common Bean (Phaseolus vulgaris L.)

Tesfaye¹,

Balcha²

2015

American J. of Plant Nutrition and Fertilization Technology

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Common bean (Phaseolus vulgaris L.) is important pulse crop in Ethiopia. The low yield of common bean is party attributed to low phosphorus fertility of the soil. A field experiment was conducted at Hanaze village, Kindo Koysha district, Wolaita, Ethiopia, to determine grain yield and yield components and agronomic efficiency using factorial combinations of 4 P rates (0, 13.2, 26.4 and 39.6 kg haG 1 P) and 4 common bean varieties (Hawassa-Dume, Nasir, Omo-95 and Remeda) in randomized complete block design with 3 replications. With the increase in P rate from 0-39.6 kg haG 1 , seeds/pod increased from 3.27-3.77 whereas days to flowering and maturity reduced from 57-52 and 76-73, respectively. The respective increase in pods/plant and grain yield (kg haG 1 ) with the increase in P rate from 0-39.6 kg haG 1 was from 2.40-17.00 and 719-1542 for variety Hawassa-Dume, Nasir 2.60-9.47 and 583-1469, Omo-95 from 2.27-6.53 and 604-1062 and Remeda 2.20-9.47 and 312-1276. Agronomic efficiency declined from 92-21, 60-22, 42-12 and 32-24, for varieties Hawassa-Dume, Nasir, Omo-95 and Remeda, respectively, with the increase in P rate from 13.2-39.6 kg haG 1 . The present experiment suggests that the soil P content would be assessed before fertilizer recommendation and variety Hawassa-Dume would be used in future to develop P efficient common bean varieties for P limited soils.

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Barley genotypes with long root hairs sustain high grain yields in low-P field

Cited by 207 publications

References 32 publications

Polyethylene Glycol (PEG)-Treated Hydroponic Culture Reduces Length and Diameter of Root Hairs of Wheat Varieties

Polyethylene Glycol (PEG)-Treated Hydroponic Culture Reduces Length and Diameter of Root Hairs of Wheat Varieties

Physiological and molecular alterations in plants exposed to high [CO2] under phosphorus stress

Effect of Phosphorus Application and Varieties on Grain Yield and Yield Components of Common Bean (Phaseolus vulgaris L.)

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