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Effect of Sucrose and Boric acid on in-vitro pollen Germination of Guaiacum officinale L

Author: 
Chaitra B. Negalur and H.C. Lakshman
Subject Area: 
Life Sciences
Abstract: 

The evaluation of pollen viability and its germination capacity are two essential criteria for pollinator’s characterization. This study was carried out to determine in vitro pollen viability and pollen germination in a medicinal plant Guaiacum officinale L. belonging to the family Zygophyllaceae. To study the role of boron in pollen germination and pollen tube growth, pollen grains were cultured in standard medium or Boron deficient medium. The maximum 48% pollen germination along with 56.89µm long pollen tube developed in 15% sucrose solution supplemented with 0.01% boric acid compaired to the boron deficient medium. Two pollen viability tests, TTC (2,3,5-triphenyl tetrazolium chloride) and Cotton blue in lactophenol were used and pollen grains showed nearly 39.2% and 40.6% viability respectively. Pollen grains which were collected in the morning (6.00hrs - 8.00 hrs.) showed best results. Stained pollen rate was higher and pollen was well-stained with Cotton blue test and pollen viability estimated with Cotton blue staining test was better than that TTC estimated with the staining test. The result revealed that the boron has a regulatory role in pollen germination and pollen tube growth in Guaiacum officinale L. which is necessary for the regeneration and conservation of this highly medicinal plant.

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