In this presentation I will demonstrate that vascular plants, not only woody species but also grass and sedge species, feature a \u201ctip-to-base\u201d widening of their vascular systems. Their xylem vessels widen from the tip to the base, from leaves, via stems, to roots, in a way that maintains the same conductance per unit leaf area with plant growth in height. This tip-to-base widening xylem architecture minimizes the energy cost of long-distance water transport. These patterns are shared across a broad range of species, and within species across a broad range of climatic conditions, implying that natural selection on the axial distribution of xylem vessels acts mainly via uniform biophysical principles of plant functional integrity, and much less via niche differentiation and divergent ecological strategies. Additionally, water ascends from the soil, progressively through plant stem and leaf xylem vessels, all the way up to the terminal stomata, under the negative pressure created by stomatal transpiration. To promote successful water transportation, coordination of stomatal and xylem traits is required to maintain a balance in water exchange between the liquid (water delivery) and the vapor (water loss) phase. I will demonstrate how plants achieve this balance via a convergent allometric coordination of xylem area and total stomatal area from entire individuals to individual leaves. Our next work is to test how this pattern converges or diverges among different species and populations, among different environments along and within climatic gradients.<\/p>\n\n\n\n
Speaker:<\/strong> Dr. Mengying Zhong<\/p>\n Affiliation: <\/strong>Peking University<\/p>\n Time:<\/strong> 4:30 PM, Tuesday, Aug. 30, 2022<\/p>\n Venue: <\/strong>ZOOM \u4f1a\u8bae\u5e73\u53f0 \u4f1a\u8bae ID\uff1a312 430 8960 \u4f1a\u8bae\u5bc6\u7801 PWD\uff1a666666\u00a0<\/p>\n \u89c6\u9891\u4e0b\u8f7dDownload Link\u94fe\u63a5: https:\/\/pan.baidu.com\/s\/1PUvXhQG88Wy3AXLmPXRg2w\u00a0 \u00a0Pwd\u63d0\u53d6\u7801: darj<\/p>\n ZOOM <\/p>\n","protected":false},"excerpt":{"rendered":" Speaker: Dr. Mengying Zhong
\u4f1a\u8bae ID\uff1a312 430 8960
\u4f1a\u8bae\u5bc6\u7801 PWD\uff1a666666
\u56fd\u5185\u7528\u6237\u4e0b\u8f7d\u5730\u5740Download address for domestic users\uff1ahttps:\/\/zhumu.com\/download
\u56fd\u9645\u7528\u6237\u4e0b\u8f7d\u5730\u5740Download address for international users\uff1ahttps:\/\/zhumu.com\/download-intl<\/p>\n\n\n
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\nAffiliation: Peking University
\nTime: 4:30 PM, Tuesday, Aug. 30, 2022<\/p>\n","protected":false},"author":2,"featured_media":3054,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts\/3053"}],"collection":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3053"}],"version-history":[{"count":1,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts\/3053\/revisions"}],"predecessor-version":[{"id":3055,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/posts\/3053\/revisions\/3055"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=\/wp\/v2\/media\/3054"}],"wp:attachment":[{"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3053"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3053"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/seminar.xtbg.ac.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3053"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}