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Related Concept Videos

Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Trihybrid Crosses02:27

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Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
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Updated: Jun 23, 2025

Isolation of Histone from Sorghum Leaf Tissue for Top Down Mass Spectrometry Profiling of Potential Epigenetic Markers
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Multi-trait association mapping for phosphorous efficiency reveals flexible root architectures in sorghum.

Barbara Hufnagel1,2,3, Karine C Bernardino1, Marcos Malosetti4,5

  • 1Embrapa Maize and Sorghum, Sete Lagoas, Minas Gerais, 35701-970, Brazil.

BMC Plant Biology
|June 14, 2024
PubMed
Summary

Sorghum with enhanced root surface area, particularly lateral root proliferation in shallow soil, shows improved phosphorus (P) efficiency and grain yield in low-P tropical soils. This root architecture is key for adaptation to P-deficient environments.

Keywords:
GWASPhosphorus acquisition efficiencyPhosphorus stressRoot architectureRoot morphology

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Area of Science:

  • Plant genetics and breeding
  • Agronomy and soil science
  • Crop physiology

Background:

  • Phosphorus (P) fixation in tropical soils limits crop yields by restricting P diffusion to plant roots.
  • Root surface area is crucial for P uptake, but its relationship with root system architecture and P efficiency is not well understood.
  • Sorghum's adaptation to low-P soils is complex and influenced by root morphology and architecture.

Purpose of the Study:

  • To investigate the genetic basis of root and P efficiency traits in sorghum under low-P conditions.
  • To determine the relationship between root architectural traits in hydroponics and low-P soil.
  • To understand how root morphology and architecture influence sorghum performance in low-P tropical soils.

Main Methods:

  • Multi-trait genome-wide association study (GWAS) to assess allelic effects on root traits, P efficiency, and grain yield.
  • Simultaneous assessment of multiple root and P efficiency traits.
  • Evaluation of root architectural traits in both hydroponic and low-P soil environments.

Main Results:

  • Specific alleles were found to enhance both root and P efficiency traits, including grain yield in low-P soil.
  • Sorghum P efficiency is linked to pleiotropic loci influencing root traits that boost grain yield under low-P stress.
  • Enhanced root surface area from lateral root proliferation, especially in the top 40 cm of soil, is critical for sorghum adaptation to low-P soils.

Conclusions:

  • Integrated quantitative trait loci (QTLs) provide a genetic framework for sorghum P efficiency research, highlighting chromosome 3.
  • Increased root surface area through lateral root development is a key trait for sorghum adaptation to low-P soils.
  • Sorghum's root system architecture allows for both shallow and deeper root development, enhancing nutrient uptake without compromising shallow rooting, crucial for adaptation to tropical soils with multiple stresses.