Evaluation of drought resistance of dwarf banana based on leaf anatomical structure
To evaluate the drought resistance of dwarf banana germplasm resources,18 dwarf banana germ-plasm resources were subjected to cross-sectional paraffin sectioning of leaves.10 leaf anatomical structural characteristics indicators such as leaf thickness and upper cuticle thickness were measured.Cluster analysis and correlation coefficient ranking were used to screen typical indicators for drought resistance evaluation,and the membership function method was used to comprehensively evaluate the drought resistance of the tested germ-plasm.The results showed that there were significant differences in the anatomical structural characteristics indicators of the leaves of the tested dwarf banana germplasm.The ratio of palisade tissue thickness/sponge tissue thickness,leaf thickness,and sponge tissue thickness were selected as typical indicators for drought re-sistance evaluation.The drought resistance of 18 dwarf banana germplasm from high to low is as follows:No.13>No.16>No.17>No.10>No.9>No.2>No.4>No.3>No.14>No.11>No.18>No.8>No.12>No.15>No.5>No.7>No.6>No.1.Among them,the drought resistance of No.13 dwarf banana germplasm is the strongest.
dwarf bananadrought resistanceleavesstructurepalisade tissue and spongy tissue ratiospongy tissue thickness