Phosphorus Stress Induced Variations in Growth Behavior and P Efficiency among Brassica Cultivars Grown with Sparingly Soluble P Sources

M. Shahbaz Akhtar, Yoko Oki, Makoto Nishigaki, Tadashi Adachi, Yoshitaka Nakashima, Yuki Nakamoto, Claudia Hartwig

Research output: Contribution to journalArticle

Abstract

To evaluate phosphorus (P)-stress-induced relative growth responses, P-efficiency characteristics, P remobilization, and redesign in root architectural systems, Brassica cultivars were grown with sparingly soluble rock phosphate and calcium phosphate [Ca3(PO4)2] or with low/high P supply in solution and sand culture experiments. Tested cultivars showed considerable genetic diversity in biomass accumulation, concentration and contents of P, P-stress factor (PSF), and P-efficiency characteristics [P-utilization efficiency (PUE), P efficiency (PE), and P-efficiency ratio (PER)]. Statistically significant correlations were observed between P efficiency and growth parameters. Elongation rates of primary roots decreased but the length of lateral roots and branched zone elongation rates increased under P starvation. Cultivars remobilized P from metabolically inactive to active sites in P-stressed plants that may have helped low-P-tolerant cultivars to establish a better rooting system, which provided basis for enhanced P-use efficiency and tolerance against P stress. Cultivars depicting high P efficiency and low PSF values were more tolerant and are a better choice to grow under P-stress environments.

Original languageEnglish
Pages (from-to)1995-2017
Number of pages23
JournalCommunications in Soil Science and Plant Analysis
Volume45
Issue number15
DOIs
Publication statusPublished - 2014

Fingerprint

Brassica
cultivar
phosphorus
cultivars
phosphate rock
calcium phosphates
rock phosphate
remobilization
rooting
growth response
starvation
active sites
root systems
biomass production
tolerance
calcium
phosphate
sand
genetic variation
biomass

Keywords

  • Brassica
  • P efficiency
  • P remobilization
  • P starvation
  • PSF
  • rock P
  • root anatomy

ASJC Scopus subject areas

  • Soil Science
  • Agronomy and Crop Science

Cite this

Phosphorus Stress Induced Variations in Growth Behavior and P Efficiency among Brassica Cultivars Grown with Sparingly Soluble P Sources. / Akhtar, M. Shahbaz; Oki, Yoko; Nishigaki, Makoto; Adachi, Tadashi; Nakashima, Yoshitaka; Nakamoto, Yuki; Hartwig, Claudia.

In: Communications in Soil Science and Plant Analysis, Vol. 45, No. 15, 2014, p. 1995-2017.

Research output: Contribution to journalArticle

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