{"id":3675,"date":"2019-07-25T09:00:30","date_gmt":"2019-07-25T07:00:30","guid":{"rendered":"https:\/\/ist.blogs.inra.fr\/afs\/?p=3675"},"modified":"2019-07-24T16:51:02","modified_gmt":"2019-07-24T14:51:02","slug":"xylogenesis-of-pinus-radiata-d-don-growing-in-new-zealand","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2019\/07\/25\/xylogenesis-of-pinus-radiata-d-don-growing-in-new-zealand\/","title":{"rendered":"Xylogenesis of Pinus radiata D. Don growing in New Zealand"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><p align=\"justify\"><em>Pinus radiata<\/em> D. Don growing in the central North Island of New Zealand did not show full winter cambial dormancy. While there was a brief cessation of cambial cell division during June (winter), cell wall thickening, secondary wall deposition, and lignification of tracheids continued throughout the year.<\/p>\n<div id=\"attachment_3676\" style=\"width: 560px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2019\/07\/Nanayakkara-et-al.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-3676\" class=\" wp-image-3676\" src=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2019\/07\/Nanayakkara-et-al-300x150.png\" alt=\"\" width=\"550\" height=\"275\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2019\/07\/Nanayakkara-et-al-300x150.png 300w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2019\/07\/Nanayakkara-et-al-768x384.png 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2019\/07\/Nanayakkara-et-al-1024x512.png 1024w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2019\/07\/Nanayakkara-et-al-640x320.png 640w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2019\/07\/Nanayakkara-et-al.png 1803w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/a><p id=\"caption-attachment-3676\" class=\"wp-caption-text\">(a\u2013f). Seasonal changes in cambial zones. \u201cC\u201d cambium, \u201cE\u201d cell expansion, \u201cT\u201d cell wall thickening, \u201cLT\u201d cell wall thickening and lignification, \u201cM\u201d mature xylem.<\/p><\/div>\n<p align=\"justify\"><strong>Context<\/strong> The xylogenesis of <em>Pinus radiata<\/em> showing only partial winter dormancy has not previously been reported.<br \/>\n<strong>Aims<\/strong> To verify the absence of winter dormancy of <em>P. radiata<\/em> growing in the mild cool climate of the central North Island. To characterise the intra-annual dynamics of xylem cell formation (cell division and enlargement as well as cell wall thickening and lignification) and growth rates and identify the main drivers of growth.<br \/>\n<strong>Methods<\/strong> Xylogenesis was monitored by microcore sampling while radial growth was monitored by dendrometers, which was then related to rainfall and temperature.<br \/>\n<strong>Results<\/strong> Xylem cell formation started by mid-July and continued until late May of the following year and peaked in spring and early autumn with minimum activity in Southern Hemisphere winter solstice (June 21, DOY 172). A higher correlation was found between the radial stem growth and temperature than with rainfall.<br \/>\n<strong>Conclusion<\/strong> There was a winter period of about 30 days where there was no cambial cell division and the differentiation of latewood cells was stalled. This slow-down was supported by dendrometer measurements. This is likely due to the relatively mild winter temperatures and absence of drought conditions that are characteristic of the central North Island climate.<\/p>\n<p><strong>Keywords<\/strong><br \/>\nDormancy, Microcores, Cambium, Lignification, Dendrometers, Climate<\/p>\n<div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-019-0859-2'  style='float: right; ' ><\/div>\n<p><strong>Publication<\/strong><br \/>\nNanayakkara, B., Dickson, A.R. &amp; Meason, D.F. Annals of Forest Science (2019) 76: 74. <a href=\"https:\/\/doi.org\/10.1007\/s13595-019-0859-2\">https:\/\/doi.org\/10.1007\/s13595-019-0859-2<\/a><\/p>\n<p>For the read-only version of the full text: <a href=\"https:\/\/rdcu.be\/bLyGr\">https:\/\/rdcu.be\/bLyGr<\/a><\/p>\n<p><strong>Data availability<\/strong><br \/>\nThe datasets generated during and\/or analysed during the current study are available from the corresponding author on reasonable request.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pinus radiata D. Don growing in the central North Island of New Zealand did not show full winter cambial dormancy. While there was a brief cessation of cambial cell division during June (winter), cell wall thickening, secondary wall deposition, and lignification of tracheids continued throughout the year. Context The xylogenesis of Pinus radiata showing only [&hellip;]<\/p>\n","protected":false},"author":106,"featured_media":3676,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,15,108],"tags":[],"class_list":["post-3675","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article-type","category-research-paper","category-special-issuetopical-collection","cat-14-id","cat-15-id","cat-108-id","has_thumb"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3675","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/users\/106"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=3675"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/3675\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media\/3676"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=3675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=3675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=3675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}