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Differentiation of Bundle Sheath, Mesophyll, and Distinctive Cells in the C 4 Grass Arundinella hirta (Poaceae)

1996; Wiley; Volume: 83; Issue: 11 Linguagem: Inglês

10.2307/2446094

1537-2197

Nancy G. Dengler, Petra M. Donnelly, Ronald E. Dengler,

Tree Root and Stability Studies

American Journal of BotanyVolume 83, Issue 11 p. 1391-1405 Article Differentiation of bundle sheath, mesophyll, and distinctive cells in the C4 grass Arundinella hirta (Poaceae) Nancy G. Dengler, Nancy G. Dengler Department of Botany, University of Toronto, Toronto, Ontario, Canada, M5A 1A1Search for more papers by this authorPetra M. Donnelly, Petra M. Donnelly Department of Botany, University of Toronto, Toronto, Ontario, Canada, M5A 1A1Search for more papers by this authorRonald E. Dengler, Ronald E. Dengler Life Sciences Division, Scarborough College, University of Toronto, Westhill, Ontario, Canada, MIC 1A4Search for more papers by this author Nancy G. Dengler, Nancy G. Dengler Department of Botany, University of Toronto, Toronto, Ontario, Canada, M5A 1A1Search for more papers by this authorPetra M. Donnelly, Petra M. Donnelly Department of Botany, University of Toronto, Toronto, Ontario, Canada, M5A 1A1Search for more papers by this authorRonald E. Dengler, Ronald E. Dengler Life Sciences Division, Scarborough College, University of Toronto, Westhill, Ontario, Canada, MIC 1A4Search for more papers by this author First published: 01 November 1996 https://doi.org/10.1002/j.1537-2197.1996.tb13933.xCitations: 17 Author for correspondence. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract The C4 grass Arundinella hirta is characterized by unusual leaf blade anatomy: veins are widely spaced and files of bundle-sheath-like cells, the distinctive cells, form longitudinal strands that are not associated with vascular tissue. While distinctive cells (DCs) appear to function like bundle sheath cells (BSCs), they differ developmentally in two ways: they are derived from ground meristem rather than procambium and they are formed 1–2 plastochrons later. This study describes ultrastructural features of differentiating of BSCs, DCs, and associated mesophyll cells (MCs) during leaf development. BSCs and DCs differ from adjacent MCs by undergoing earlier cell enlargement, greater rates of chloroplast enlargement, reduction of chloroplast thylakoids at late stages of differentiation, more extensive starch formation, greater wall thickening, and deposition of a suberin lamella. The precocious delimitation of the bundle sheath layer is reflected in earlier BSC enlargement and vacuole growth. Derivation of DCs from ground meristem is correlated with late developmental changes in chloroplast size, wall thickness, and plasmodesmatal density. Despite these differences in timing of events, particularly at early stages, the development of the specialized structural features of BSCs and DCs is essentially similar. Thus, proximity to vascular tissue appears to be nonessential for the coordination and regulation of BSC- and MC-specific developmental events. Citing Literature Volume83, Issue11November 1996Pages 1391-1405 RelatedInformation