00491naa a2200157 a 450000100080000000500110000800800410001910000190006024501100007926000090018965000100019870000190020870000160022770000140024377300760025718407012010-01-10       1999    bl ---       0--  u    #d1 aFRACHEBOUD, Y.  aChlorophyll fluorescence as a selection tool for cold tolerance of photosynthesis in maize (Zea mays l.).  c1999  aMilho1 aMHALDIMANN, P.1 aLEIPNER, J.1 aSTAMP, P.  tJournal of Experimental Botanygv. 50, n. 338, p. 1533-1540, Sep, 1999.