Daphne Osborne
... that British plant physiologist Daphne Osborne showed that the gas ethylene is a natural plant hormone which regulates ageing and the shedding of leaves and fruits?
... that British <a href="./Plant_physiology" id="mwD0c" rel="mw:WikiLink" title="Plant physiology">plant physiologist</a> <b id="mwD0g"><a href="./Daphne_Osborne" id="mwD0k" rel="mw:WikiLink" title="Daphne Osborne">Daphne Osborne</a></b> showed that the gas <a href="./Ethylene" id="mwD0o" rel="mw:WikiLink" title="Ethylene">ethylene</a> is a natural <a href="./Plant_hormone" id="mwD0s" rel="mw:WikiLink" title="Plant hormone">plant hormone</a> which regulates <a href="./Senescence" id="mwD0w" rel="mw:WikiLink" title="Senescence">ageing</a> and the <a href="./Abscission" id="mwD00" rel="mw:WikiLink" title="Abscission">shedding</a> of leaves and fruits?