Weathering deterioration in pre-harvest of soybean seeds: physiological, physical, and morpho-anatomical changes

ABSTRACT: Successive cycles of water absorption and loss favor weathering deterioration, one the main factors that affect quality soybean seeds. This study evaluated physiological, physical, morpho-anatomical changes in seeds under deterioration at pre-harvest phase. Six cultivars (BMX Apolo, DM 6563, NS 5959, NA 5909, BMX Potencia, TMG 1175) were produced a greenhouse underwent through rainfall simulation system, applying 0, 60, 120, 180 mm precipitation Each level was divided into two applications an interval 72 h: 60 (30 + 30), 120 (60 60), (90 90). After harvest, for germination, vigor, physical properties. Weathering induced by simulated phase contributes to reduction seed germination vigor is conditioned genotype. The increase intensity led more significant damage seeds, as evidenced X-ray tetrazolium test. Cultivars 6563 Potencia susceptible, while 5909 less susceptible (especially highest level; mm). Anatomical caused lead cell compaction rupture, mainly layers hourglass parenchyma, forming intracellular spaces. presence physiological quality.