02033naa a2200241 a 450000100080000000500110000800800410001902400310006010000190009124500830011026000090019352013720020265000130157465000120158765000230159965000110162265300200163365300210165370000250167470000220169970000260172177300440174720994512018-11-16       2018    bl uuuu     u00u1 u    #d7 a10.1139/cjb-2018-00212DOI1 aRIBOLDI, L. B.  aIncidence of blossom-end rot in elongated tomato fruit.h[electronic resource]  c2018  aBlossom-end rot (BER) is a physiological disorder that can affect 100% of the fruit crop depending on the genotype. Tomato varieties with elongated fruit usually have a greater susceptibility to BER than other varieties. To evaluate and identify the possible physiological and morphological characteristics related to the onset of BER development, four varieties of long-shape tomato fruit with different susceptibility to BER: ?San Marzano,? ?Banana Legs,? ?Roma,? and ?Mini-Roma? were examined. Our results show that ?San Marzano? and ?Banana Legs? (elongated fruit) had a higher incidence of BER and lower Ca2+ concentration in the distal fruit tissue. ?San Marzano? (the most elongated fruit) presented higher electrolyte leakage in the distal fruit tissue. By comparison, ?Roma? and ?Mini-Roma? (less elongated fruit) were less susceptible to BER and had a higher ratio for proximal/distal fruit Ca2+ and a lower distal cell-wall bound content of Ca2+. Additionally, xylem functionality (vessels transporting water and solutes) in the distal fruit tissue was also higher in these more-tolerant varieties. These results support the theory that total fruit content of Ca2+ is not the only factor determining fruit susceptibility to BER, but rather a balance between physiological and morphological factors that influence Ca2+ transport and allocation in the fruit.  aTomatoes  aDoença  aFisiologia Vegetal  aTomate  aBlossom-end rot  aPodridão floral1 aARAÚJO, S. H. da C.1 aFREITAS, S. T. de1 aCASTRO, P. R. de C. e  tBotanygv. 96, n. 10, p. 663-673, 2018.