01544naa a2200241 a 450000100080000000500110000800800410001910000180006024501420007826000090022052008660022965000090109565000160110465000160112065000280113665000090116465000160117365000110118965300110120065300110121170000190122277300610124110772051996-05-24       1975    bl ---       0--  u    #d1 aMENHENETT, R.  aPossible involvement of growth substances in the response of tomato plants (Lycopersicon esculentum Mill) to different soil temperatures.  c1975  aTomato plants (cv Suttons alicante) were subjected of two soil temperatures of about 7 graus and 22oC with a common air temperature of 22-24oC. "Low" soil temperature markedly reduced root and shoot growth and the quantity of xylem exudate compared with "high" soil temperature.  Applicatio of low doses of gibberelic acid (GA3) to the apex of intactplants increased stem length and leaf area. Benzylaminopurine (BAP) did not measurably affect these parameters. In contrast, leaf fises excised from plants grown at "low" soil temperature did increase in area when floated on solutions of either GA3 or BAP. Leaf discs from plants at "high" soil temperature responded only to GA. Data are presented toshow that "low"root temperature leads to alterations in the hormonecontent of the sap from tomato which may contribute to the observed reduction of shoot growth.  asoil  atemperature  aCrescimento  aLycopersicon Esculentum  aSolo  aTemperatura  aTomate  aGrowth  aTomato1 aWAREING, P. F.  tJournal of Horticultural Sciencegv.50, p.381-397, 1975.