a) Growth of pollen tube towards the ovule. Sperm cells exist at the tip of the tube. Pollen tube contents (PTC) are the liquid part of the pollen tube, shown in yellow. b) Upon pollination to the ...

Disentangling the relative importance of biotic and abiotic constraints in plant reproduction is a major challenge in reproductive ecology. Here, we tested the 'resource limitation hypothesis' that ...

THE study of tho vascular anatomy of the flower of Gloriosa superba Linn., a liliaceous plant common in India and neighbouring tropical countries, has revealed the occurrence of vascular structure in ...

This is a preview. Log in through your library . Abstract The infrasubfamilial relations within Bromeliaceae are still not fully understood, especially in Bromelioideae. Billbergia nutans ...