Should structure -function relations be considered separately for Homobaric vs. Heterobaric leaves?

dc.contributor.author	Liakoura, V	en
dc.contributor.author	Fotelli, MN	en
dc.contributor.author	Rennenberg, H	en
dc.contributor.author	Karabourniotis, G	en
dc.date.accessioned	2014-06-06T06:49:32Z
dc.date.available	2014-06-06T06:49:32Z
dc.date.issued	2009	en
dc.identifier.issn	00029122	en
dc.identifier.uri	http://dx.doi.org/10.3732/ajb.0800166	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/4651
dc.subject	Bundle sheath extensions	en
dc.subject	Heterobaric leaves	en
dc.subject	Homobaric leaves	en
dc.subject	Leaf anatomy	en
dc.subject	Nitrogen concentration	en
dc.subject	Photosynthetic capacity	en
dc.subject	δ 13C.	en
dc.subject.other	anatomy	en
dc.subject.other	carbon isotope	en
dc.subject.other	concentration (composition)	en
dc.subject.other	leaf	en
dc.subject.other	nitrogen	en
dc.subject.other	photosynthesis	en
dc.subject.other	shrub	en
dc.title	Should structure -function relations be considered separately for Homobaric vs. Heterobaric leaves?	en
heal.type	journalArticle	en
heal.identifier.primary	10.3732/ajb.0800166	en
heal.publicationDate	2009	en
heal.abstract	Tree and shrub species can be differentiated into two major groups based on their substantially different leaf anatomy: heterobaric and homobaric. In contrast to homobaric leaves, heterobaric leaves have bundle sheath extensions (BSEs) that create transparent regions on their lamina. Recent studies have shown that BSEs transfer visible light to internal mesophyll layers, thus affecting the photosynthetic performance of heterobaric leaves. Whether the two leaf types also differ in other functional and structural traits has not been addressed, nor have any structure -function relations. Here, we measured key anatomical and physiological parameters and tested their relationships in 30 species with different leaf types. Heterobaric leaves were thinner with lower leaf mass per area, had higher nitrogen concentration per mass, were 13C-enriched, and achieved comparable photosynthetic capacity per area but had higher photosynthetic capacity per mass compared to homobaric leaves. Relations between leaf construction cost, nitrogen concentration, and photosynthesis followed the general pattern of the "" leaf economic spectrum, "" but differed between homobaric and heterobaric leaves. We suggest that the mechanisms controlling these relations differ between the two leaf types, presumably due to their distinct anatomy.	en
heal.journalName	American Journal of Botany	en
dc.identifier.issue	3	en
dc.identifier.volume	96	en
dc.identifier.doi	10.3732/ajb.0800166	en
dc.identifier.spage	612	en
dc.identifier.epage	619	en