Japonica and indica differences in large vascular bundles in culm
1988
Huang Huang (Hunan Agricultural Coll., Changsha, Hunan (China). Dept. of Agronomy)
The number of large vascular bundles were studied in the first internode from the top (NLVBFI) and the number of primary branches of panicle (NPBP) at heading, in 45 indica (hsien) and japonica (keng) type varieties during 1981-82. NLVBFI was 20.9 plus or minus 6.3 for indica type and 10.1 plus or minus 1.9 for japonica type. NPBP showed almost no differences between the two types. The ratio for NLVFI/NPBP for 10 indicas averaged 1.97 and ranged from 1.64 to 2.27. The ratio for 10 japonicas averaged 1.13 and ranged from 1.02 to 1.19. It seems that the ratio can be considered a new character to distinguish the two types. The difference in NLVBFI between the two types may relate to evolution and to nutrient transport.
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