Pollen Viability of Asian Pear and Effect of PGR,B and Sucrose on Germination and Pollen Tube Development
Abstract：The pollen viability of 5 cultivars of Asian pear, the influence of flower position in a cluster and the effect of GA3, 2,4-D, B and sucrose on its germination and tube development were studied in vitro. The difference of viability among 5 cultivars was significant. The pollen of Huanghua germinated fast. Both germination rate and pollen tube length of Shinseiki were much higher and longer. Nijisseiki had the poorest performances on germination. Huanqing showed a low capability on pollen tube development; the length was the shortest within the 5 varieties. The flower position in a cluster and developmental stage influenced pollen viability;the viability of pollen grain from outer flowers of a cluster was greater than those from central flowers. Mediate concentration of B,GA3 and 2,4-D increased germination and pollen tube growth. The germination rate and pollen tube length on the medium that contained 15 mg/L of boron were greater than those of other treatments. There were negative relationship trend between pollen viability and the content of GA3 and 2,4-D. High content of sucrose on the medium benefited germination and pollen tube development. There was a linear regression relationship between germination rate and content of sucrose in the medium (R2=0.983).
Keywords：ViabilityEffectPlant growth regulatorBoronSucrose
Publication Date：2004-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 289-294 )