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uBio  Web  Results 1 - 10 of about 36 Synonyms:    Callaeum nicaraguense     Jubelina nicaraguensis     Mascagnia nicaraguensis  Broader Terms:    Callaeum      External Resources: 1.  Lateral roots, in addition to adventitious roots, form a barrier to radial oxygen loss in Zea nicaraguensis and a chromosome segment introgression line in maize. Pedersen O, Nakayama Y, Yasue H, Kurokawa Y, Takahashi H, Heidi Floytrup A, Omori F, Mano Y, David Colmer T, Nakazono M The New phytologist New Phytol Lateral roots, in addition to adventitious roots, form a barrier to radial oxygen loss in Zea nicaraguensis and a chromosome segment introgression line in maize. 94-105 10.1111/nph.16452 Plants typically respond to waterlogging by producing new adventitious roots with aerenchyma and many wetland plants form a root barrier to radial O2 loss (ROL), but it was not known if this was also the case for lateral roots. We tested the hypothesis that lateral roots arising from adventitious roots can form a ROL barrier, using root-sleeving electrodes and O2 microsensors to assess ROL of Zea nicaraguensis, the maize (Zea mays ssp. mays) introgression line with a locus for ROL barrier formation (introgression line (IL) #468) from Z. nicaraguensis and a maize inbred line (Mi29). Lateral roots of Z. nicaraguensis and IL #468 both formed a ROL barrier under stagnant, deoxygenated conditions, whereas Mi29 did not. Lateral roots of Z. nicaraguensis had higher tissue O2 status than for IL #468 and Mi29. The ROL barrier was visible as suberin in the root hypodermis/exodermis. Modelling showed that laterals roots can grow to a maximum length of 74 mm with a ROL barrier, but only to 33 mm without a barrier. Presence of a ROL barrier in lateral roots requires reconsideration of the role of these roots as sites of O2 loss, which for some species now appears to be less than hitherto thought. © 2020 The Authors New Phytologist © 2020 New Phytologist Foundation. Pedersen Ole O 0000-0002-0827-946X Freshwater Biological Laboratory, Department of Biology, University of Copenhagen, Universitetsparken 4, 3rd floor, 2100, Copenhagen, Denmark. UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, WA, 6009, Australia. Nakayama Yohei Y Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601, Japan. Yasue Hiroki H Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601, Japan. Kurokawa Yusuke Y 0000-0002-2321-0292 Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601, Japan. Takahashi Hirokazu H 0000-0001-6182-3236 Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601, Japan. Heidi Floytrup Anja A Freshwater Biological Laboratory, Department of Biology, University of Copenhagen, Universitetsparken 4, 3rd floor, 2100, Copenhagen, Denmark. Omori Fumie F Forage Crop Research Division, Institute of Livestock and Grassland Science, NARO, 768 Senbonmatsu, Nasushiobara, Tochigi, 329-2793, Japan. Mano Yoshiro Y 0000-0001-5478-8954 Forage Crop Research Division, Institute of Livestock and Grassland Science, NARO, 768 Senbonmatsu, Nasushiobara, Tochigi, 329-2793, Japan. David Colmer Timothy T 0000-0002-3383-9596 UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, WA, 6009, Australia. Nakazono Mikio M 0000-0001-7119-2052 UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, WA, 6009, Australia. Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601, Japan. eng Journal Article Research Support, Non-U.S. Gov't 2020 02 21 England New Phytol 9882884 0028-646X IM ROL aerenchyma crop wild relative hypoxia maize (Zea mays ssp. mays) root internal aeration root respiration soil waterlogging or flooding 2019 12 15 2020 01 21 2020 1 29 6 0 2020 1 29 6 0 2020 1 29 6 0 ppublish 31990995 10.1111/nph.16452