Physiological characteristics of linuron-resistant Portulaca oleracea Academic Article

abstract

• Studies were conducted to compare physiological characteristics of linuron-susceptible and -resistant Portulaca oleracea. The susceptible biotype had heavier seed and germinated more rapidly than the resistant biotype. Eight weeks after seeding, fresh and dry weights of susceptible P. oleracea plants were significantly greater than those of resistant plants. Susceptible P. oleracea had a significantly higher CO2 assimilation rate at 30 C, but was similar to that of resistant P. oleracea at 40 C. The susceptible biotype had a significantly higher CO2 assimilation rate at CO2 concentrations 600 ppm and at incident light levels 900 mol m-2 s-1. The susceptible biotype had higher carboxylation and photochemical efficiencies.

authors

• Masabni, Joseph

published proceedings

• WEED SCIENCE

author list (cited authors)

• Masabni, J. G., & Zandstra, B. H.

citation count

• 2

complete list of authors

• Masabni, JG||Zandstra, BH

publication date

• July 2000

publisher

• Cambridge University Press (CUP)  Publisher

published in

• Weed Science  Journal

keywords

• Diuron
• Internal Co2 Concentration
• Photochemical Efficiency
• Simazine
• Total Dark Respiration

Digital Object Identifier (DOI)

• 10.1614/0043-1745(2000)048[0420:PCOLRP]2.0.CO;2

start page

• 420

end page

• 425

volume

• 48

issue

• 4

URL

• http://dx.doi.org/10.1614/0043-1745(2000)048[0420:pcolrp]2.0.co;2