T REPRO N DU The International Journal of Plant Reproductive Biology 12(1) Jan., 2020, pp.84-94 LA C P T I F V O E B Y T I DOI 10.14787/ijprb.2020 12.1. O E I L O C G O S I S T E S H Development and Structure of Phytomelanin in Coreopsideae (Asteraceae) T Roshni Rajamohan Mathur1 and Arun K. Pandey* Department of Botany, University of Delhi, Delhi-110007, India 1Department of Botany, Deshbandhu College (University of Delhi), New Delhi-110019, India *e-mail :
[email protected] Received : 12.11.2019; Revised: 27. 11.2019; Accepted and published online: 05.12.2020 ABSTRACT The pattern of deposition of phytomelanin has been studied in 12 taxa of the tribe Coreopsideae viz., Bidens biternata, B. connata, B. pilosa, B. parviflora, Cosmos sulphureus, Coreopsis grandiflora, C. major, Dahlia merckii, D. pinnata, Moonia arnottiana (subtribe Coreopsidinae) and Chrysanthellum indicum, Glossocardia bosvallia (subtribe Chrysanthellinae). Most of the species studied had pappus represented as awns or scales. In subtribe Coreopsidinae, the cypselae of Bidens connata, B. tripartita are non-striated whereas in Bidens biternata, B. pilosa and Dahlia spp., cypselae are striated. In the members of subtribe Chrysanthellinae, cypselae are non-striated. There was overall similarity in the pattern of spine and pore development at the tribal level. Keywords : Asteraceae, Phytomelanin, Coreopsideae Phytomelanin is a rigid, blackish brown, inert and The tribe Coreopsideae (Asteraceae) includes amorphous layer found in the walls of mature fruits and seeds approximately 24 genera and over 500 species (Crawford et of some groups of angiosperms.