V. K. Shivrain, “Molecular Characterization of the Acetolactate Synthase (ALS) Gene and Phenotypic Diversity in Red Rice (Oryza sativa L.),” M.S. Thesis, University of Arkansas, Fayetteville, 2004.

has been cited by the following article:

• TITLE: Morphological and Physiological Responses of Weedy Red Rice (Oryza sativa L.) and Cultivated Rice (O. sativa) to N Supply

  AUTHORS: Marites A. Sales, Nilda R. Burgos, Vinod K. Shivrain, Brad Murphy, Edward E. Gbur

  KEYWORDS: Hydroponics, Nitrogen Concentration, N Uptake, Rice (Oryza Sativa L.), Root Morphology, Sucrose Concentration, Sugars

  JOURNAL NAME: American Journal of Plant Sciences, Vol.2 No.4, October 31, 2011

  ABSTRACT: Red rice (Oryza sativa L.), a noxious weed in rice production, competes with cultivated rice for nutrients. Accumulation of more N in red rice than in cultivated rice may be due to a mechanism different from that of cultivated rice. To test this assumption, red rice and cultivated rice were grown in nutrient solution to compare their growth and physiological responses to N supply. Experimental design was a split-plot, where main plot factor was rice type (Stf-3, ‘Wells’); split-plot factor was N treatment [T1 (complete nutrient solution); T2 (–NH4NO3); T3 (+NH4NO3 for 24-h post-N deficiency); and T4 (+NH4NO3 for 48-h post-N deficiency)]. Nitrogen deficiency was defined as N sufficiency index (NSI) 4, Stf-3 showed higher increment in root length and surface area than Wells. Shoot tissue concentrations of N and total sugars were measured to determine physiological response in N-deficient and N-supplemented plants. Stf-3 had greater N and sucrose tissue concentrations at N-deficient conditions compared with Wells, implying a stress-adaptive molecular mechanism regulated by N and sucrose availability.