MERISTEM INITIAL CELLS IN IRRADIATED ROOTS OF VICIA FABA
Beans (Vicia faba) were germinated for 24 hr and irradiated with x rays. Primary roots were fixed after 9, 11, and 21 days. Aberrant chromosome complements, the result of chromosome changes induced by irradiation, were present. They were used as cell markers to estimate the number of cell types present in the meristem initial cells of the growing root and the number of primordium initial cells from which root regeneration occurred. Up to 9 cell types occur as meristem initials. From the relative frequencies of the different cell types, it is estimated that there are at least 32 actual meristem initial cells in regenerating irradiated primary roots. This result is compatible with observations made on normal roots. The chimaerical nature of the regenerating root apparently does not interfere with the normal organization of the meristem, but it serves to reveal what part of the organization is. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- NSA Number:
- NSA-15-007206
- OSTI ID:
- 4119100
- Journal Information:
- Ann. Botany (London), Vol. Vol: 24; Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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