'''Helmut Metzner''' (* deutscher Pflanzenphysiologe und Universitätsprofessor.

== Leben und Wirken ==
Metzner studierte an den Universitäten Münster und Göttingen Biologie, Physik und Physikalischen Chemie. Sein Studium schloss er 1950 mit einer Dissertation zum Thema „''Elektrochemische Messungen an ungereizten Pflanzenzellen''“ ab. Nach einem Forschungsaufenthalt 1952 in Berkeley, Westfälischen Wilhelms-Universität in Münster, wo er sich mit der Erforschung der Chloroplasten beschäftigte. Nach Arbeiten an der Universität Göttingen habilitierte er sich dort mit Untersuchungen über „''Veränderung der Blattproteine bei photoperiodischer Induktion''“.

1961 erhielt Metzner einen Ruf an die Europäischen Akademie für Umweltfragen in Tübingen, deren Präsident Metzner bis zu seinem Tod 1999 war.

Zusammen mit Hans Karl Filbinger, Günter Rohrmoser, Heinz Karst und Erich Baumann gründete Metzner 1979 das Studienzentrum Weikersheim, in dessen Präsidium er bis 1995 mitwirkte.

1993 wurde Metzner emeritiert. 1999 starb er in Tübingen.

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'''Helmut Metzner''' (born plant physiologist, Professor of Biochemical Plant Physiology at Eberhard Karls University of Tübingen, the founder of the European Academy of Environmental Affairs and a co-founder of the Weikersheim Think Tank.<ref>[http://www.life.uiuc.edu/govindjee/history/obit/MetznerObitNew.pdf Obituary in ''Photosynthesis Research'' '''63''':  191–194, 2000.]</ref><ref>[http://web.archive.org/web/20021218065426/http://www.sepp.org/weekwas/1999/Dec25.htm Obituary in "The Week That Was", 25 Dec 1999], Science & Environmental Policy Project.</ref><ref>[http://www.uni-tuebingen.de/uni/qvo/Tun/TUN95-25.html Obituary by Prof. Dr. Dr. h.c. Klaus Wegmann on the University of Tübingen web site] (in German).</ref>

== Life and Works ==
Metzner studied biology, physics and physical chemistry at the University of Münster and the University of Göttingen. He completed his studies in 1950 with a dissertation on the subject of "''Elektrochemische Messungen an ungereizten Pflanzenzellen''" (Electro-chemical measurements of unstimulated plant cells).

He received his doctorate in postdoctoral fellow) at the Botanical Institute of the University of Münster, where he researched in the field of chloroplasts. After completing his training at the University of Göttingen, he qualified to become a professor with an investigation about "''Veränderung der Blattproteine bei photoperiodischer Induktion''" (Changes of leaf proteins by photo-periodic induction). He specialised in the biochemistry of photosynthesis.

In 1961, Metzner was offered a professorship at the University of Tübingen, where he became the founding director of the new '''Institute for Chemical Plant Physiology'''. In addition to the standard academic program, he also organised adult education courses in Baden-Württemberg as of 1981 in Ecology and its biological basis, which were attended by more than 6,000 people. This led to the founding of the European Academy of Environmental Affairs at Tübingen, of which Metzner remained President until his death in 1999. 

Together with Hans Karl Filbinger, Günter Rohrmoser, Heinz Karst and Erich Baumann, Metzner founded the Weikersheim Think Tank in 1979, and he remained a director until 1995. In 1995 he organised a conference in Leipzig, Germany, which produced the Leipzig Declaration on global climate change.