Evidence from near-isogenic lines that root penetration increases with root diameter and bending stiffness in rice

Functional Plant Biology : FPB
Lawrence John ClarkWilliam Richard Whalley

Abstract

Deep rooting can be inhibited by strong layers, although there is evidence for species and cultivar (cv.) differences in their penetration ability. Here, the availability of near-isogenic lines (NILs) in rice (Oryza sativa L.) was exploited to test the hypothesis that increased root diameter is associated with greater root bending stiffness, which leads to greater root penetration of strong layers. Wax/petrolatum discs (80% strong wax) were used as the strong layer, so that strength can be manipulated independently of water status. It was found that good root penetration was consistently associated with greater root diameter and bending stiffness, whether comparisons were made between cvs or between NILs. With NILs, this effect was seen with 'research' lines bred from recombinant inbred lines of a cross between cvs Bala and Azucena and also in improved lines developed from cv. Kalinga III by introgression of parts of the genome from Azucena. Much of the bending behaviour of roots could be explained by treating them as a simple cylinder of material. In both wax disc and sand culture systems, roots that had encountered a strong layer had lower bending stiffness than roots that had not encountered a strong layer which is a novel r...Continue Reading

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Citations

Mar 15, 2012·Plant Signaling & Behavior·Parankusam SantisreeRameshwar Sharma
Sep 13, 2012·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·K A SteeleD S Virk
Sep 18, 2013·Journal of Experimental Botany·Kemo JinWilliam R Whalley
Jul 28, 2015·Plant and Soil·Kemo JinWilliam R Whalley
Jul 12, 2018·PloS One·Harrison Gregory FriedBenjamin Fallen
Dec 5, 2018·Rice·Mohamed Hazman, Kathleen M Brown
Sep 19, 2014·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Amy L BurtonJonathan P Lynch
Mar 15, 2015·Journal of Experimental Botany·Junzhou LiQuanzhi Zhao
Jun 15, 2016·Rice·Phanchita VejchasarnKathleen M Brown
Aug 26, 2017·Genome Génome / Conseil National De Recherches Canada·Jian MaXiu-Jin Lan
Jun 20, 2014·PloS One·Sruthi NarayananP V Vara Prasad
Jul 4, 2013·Annals of Botany·Philip J WhiteBlair M McKenzie
Apr 28, 2020·Plant Signaling & Behavior·Xuanjun FengYanli Lu
Apr 25, 2014·Journal of Experimental Botany·Jonathan P LynchKathleen M Brown
Apr 24, 2015·Journal of Experimental Botany·Joseph G ChimunguJonathan P Lynch
Jan 4, 2021·Plant Cell Reports·Showkat Ahmad Ganie, Golam Jalal Ahammed
Aug 29, 2021·Plant, Cell & Environment·Dorien J VanheesJonathan P Lynch

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