Characteristics of the root system in two Brazilian upland rice varieties which exhibit contrasting behavior towards drought tolerance

Abstract

Lateral root emission contributes to the mechanism of drought escape in Catetão. Catetão increased the root number at 60-90° angle under drought stress. Membrane integrity was less compromised during drought stress in Catetão. Ratio of deep rooting can be used to select tolerant genotypes to the drought stress.

Investigation the effect of drought stress on tolerant and resistant rice (Oryza sativa L.) varieties in terms of morphologic and genetic characters

“…A higher root biomass was obtained in Catetão variety when compared to Mira. Moreover, a higher deep rooting rate (RDR) was observed for Catetão while Mira remained stable in response to drought stress in this study(Ferreira et al 2020). It was noted that as the severity of the drought factor increased, dry matter weight and relative water content was decreased and decrease ratio was higher in the sensitive variety (Ghotbi-Ravandi et al2014).We used dhan 65 and dhan 71 rice varieties to examine the effects.…”

“…ciency in transgenic tobacco plants(Werner et al 2010). Another study was carried out byFerreira et al (2020). Drought stress during 14 days was applied on Catetão and Mira unpland rice varieties which exhibit opposite behavior towards drought tolerance.…”