Wood anatomy reflects the distribution of Krascheninnikovia ceratoides (Chenopodiaceae)

The phylogeographic history of Krascheninnikovia reflects the development of dry steppes and semi-deserts in Eurasia

“…There is an ongoing discussion about potential subspecies and species in the genus Krascheninnikovia . While some argue that Krascheninnikovia is monospecific with only two subspecies ceratoides and lanata 22 , others distinguish several entities at the specific level, such as K. arborescens , K. ewersmanniana, and K. compacta from Middle and Central Asia 48 , 87 – 90 . Our data did not include samples representing these potential taxa, except for two populations identified as K. ewersmanniana (P069 and P070).…”

“…(Chenopodiaceae) is a particularly suitable subject for reconstructing the evolutionary history of dry steppe and semi-desert formations. It is widespread throughout the Northern Hemisphere, growing on shortgrass steppes, desert steppes, and in semi-deserts 22 , 23 . Although its high morphological variation has led to the recognition of a variety of taxonomical names, Krascheninnikovia is now thought to constitute a single species with two subspecies, the Eurasian K. ceratoides subsp.…”

“…Krascheninnikovia ceratoides subsp. lanata is present on the shortgrass prairies, dry scrubland, and in semi-desert regions of central and western Canada, the USA, and Mexico 22 .

Figure 1 Population sampling of Krascheninnikovia ceratoides .

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Intraspecific variation of Paubrasilia echinata (Fabaceae) wood along a latitudinal gradient in Brazil

“…echinata grows in environments characterized by dry climate and sandy soil of the Brazilian coastal zone. Wood features can be a sensitive variable for climate and for site conditions as observed by Heklau and von Wehrden (2011) studying K. ceratoides.…”

“…such as altitude, latitude, temperature, rainfall and soil, showing that wood characters can be related to some of these parameters (e.g., van den Oever et al, 1981;Baas and Carlquist, 1985;Baas and Schweingruber, 1987;Noshiro et al, 1994;Noshiro and Suzuki, 1995;Alves and Angyalossy-Alfonso, 2000;Marcati et al, 2001;Alves and Angyalossy-Alfonso, 2002;Luchi 2004;Lens et al, 2004;Ribeiro and Barros, 2006;Aguilar-Rodrigues et al, 2006;Barros et al, 2006;Terrazas et al, 2008;Bosio et al, 2010;Heklau and von Wehrden, 2011;Zheng and Cabrera 2013). On the other hand, no significant ecological trends in wood structure at species level was reported(e.g., Sastrapradja and Lamoureux, 1969;van der Graaff and Baas, 1974;Noshiro and Baas, 2000;Liu and Noshiro, 2003).…”