The Effect of Brassinosteroid on Pollen Germination and Tube Growth in Three Dianthus Species

Abstract

In this study, the effect of brassinosteroid on pollen germination and tube growth of Dianthus calocephalus, Dianthus carmelitarum, and Dianthus deltoides were investigated. Brassinosteroid treatments did not cause a significant increase in pollen germination of Dianthus calocephalus, while the pollen tube length significantly increased by 8.39% at 0.05 mM, 43.75% at 0.25 mM, 38.40% at 0.5 mM and 7.30% at 2.5 mM in compare the control. Also, brassinosteroid treatments did not cause a significant increase in pollen germination, and tube length in Dianthus carmelitanum. Although brassinosteroid treatments did not cause a significant change in pollen tube length in Dianthus deltoides, 0.05 mM, 0.025 mM and 0.5 mM brassinosteroid treatments were found to have an increasing effect on pollen germination. Besides, brassinosteroid treatment did not cause a significant change in tube abnormality for all species and all concentration.

Exogenous Brassinosteroids Regulate Mango Fruit Set through Inflorescence Development and Pollen Fertility

“…4A and 4B). These results confirmed that the pollen fertility increased by BR application could promote pollen tube growth into the ovary, consistent with various studies that reported positive effects of BRs on pollen germination, such as in the beautiful-headed carnation (Genç, 2019), grapevines (Gökbayrak and Engin, 2016), and in pomegranates (Gökbayrak and Engin, 2018a).…”