Ng, Y K Root growth, secondary root formation and root gravitropism in carotenoid-deficient seedlings of Zea mays L. [electronic resource] - Annals of botany 1985 - 387-94 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0305-7364 Standard No.: 10.1093/oxfordjournals.aob.a086917 doi Subjects--Topical Terms: Abscisic Acid--antagonists & inhibitorsCarotenoids--antagonists & inhibitorsGravitropism--drug effectsHerbicides--pharmacologyMutationPlant Roots--drug effectsPyridones--pharmacologyZea mays--genetics