Nitrogen form and solution pH effects on root anatomy of cranberry.

摘要: Root sections of cranberry (Vaccinium macrocarpon Ait. cv. Searles) were microscopically examined to document the typical anatomy roots and changes in root response N-form solution pH. Cranberry cuttings rooted, then established hydroponic conditions with three N two pH re- gimes. The regimes equal levels 1) NH 4-N alone, 2) 4/NO3-N combination, or 3) NO3-N alone. was maintained at 4.5 6.5. apical regions using phase contrast, bright field, epifluorescence micros- copy. tip develops a closed organization te- trarchal vascular cylinder, cortex, cap traceable independent meristem cell layers. most obvious treatment difference an accumulation unidentified "granules" subepidermal layer, readily visible microscopy Roots produced branched less than those 6.5 had more "quiescent" initials; 6.5, these developed frequently into branch roots. morphogenesis Vaccinium species has been shown be affected by Medappa Dana (1970) reported that became darker, thicker, as increased