Abnormal Another Development and High Sporopollenin Synthesis in Benzotriazole Treated Male Sterile Helianthus Annuus L

Indian Journal of Experimental Biology, Vol. 46, pp. 71-78, January 2008

9 Pages Posted: 14 Feb 2008 Last revised: 10 Mar 2008

See all articles by Surya Mani Tripathi

Surya Mani Tripathi

International Crops Research Institute for Semi-Arid Tropics

Abstract

Foliar application of 1.5% benzotriazole induced 100% pollen sterility in H. annuus. Pollen abortion in treated plants was mainly associated with abnormal behaviour of tapetum. A limited number of anther locule showed early degeneration of tapetum followed by disintegration of sporogenous tissues. On the other hand, some locules showed normal development of tapetum at initial stages. However, this tapetum exhibited degenerated and non-functional cell organelles. In both these situations tapetum failed to provide proper nourishment to developing microspores. The ultrastructure of both tapetum and microspores is different from that of control material with irregularities of exine deposition, endopolyploidy of tapetal nuclei and an alteration of organelle composition being correlated with sterility. Pollen grains thus developed were devoid of nucleus and cell organelles and were complete sterile.

Keywords: Helianthus annuus L., Benzotriazole, Induced male sterility, Tapetum development

JEL Classification: A00

Suggested Citation

Tripathi, Surya Mani, Abnormal Another Development and High Sporopollenin Synthesis in Benzotriazole Treated Male Sterile Helianthus Annuus L. Indian Journal of Experimental Biology, Vol. 46, pp. 71-78, January 2008. Available at SSRN: https://ssrn.com/abstract=1092945

Surya Mani Tripathi (Contact Author)

International Crops Research Institute for Semi-Arid Tropics ( email )

ICRISAT
Patancheru
Hyderabad, AP 502324
India
08008123544 (Phone)

HOME PAGE: http://www.icrisat.org

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