TY - JOUR AU - Salazar, Clery G. PY - 1966/10/01 Y2 - 2024/03/19 TI - Comparative Anatomy of Citrus and Cold-Hardiness JF - The Journal of Agriculture of the University of Puerto Rico JA - JAUPR VL - 50 IS - 4 SE - Articles DO - 10.46429/jaupr.v50i4.3470 UR - https://revistas.upr.edu/index.php/jaupr/article/view/3470 SP - 316-336 AB - Seedlings of four varieties of citrus were used, representing four species with a range of cold-tolerance from high to very low. They were examined anatomically and the findings related to the accepted cold-tolerance of the varieties and with their performance in freezing tests. The varieties selected were, in descending order of cold-tolerance: 'Changsha' mandarin (<em>Citrus reticulata</em>); "Taiwanica' sour orange (<em>C. taiwanica</em>); 'Parson Brown' sweet orange (<em>C. sinensis</em>)', and 'Mexican' ('West Indian') lime (<em>C. aurantifolia</em>). ER -