Petals in Ranunculales are nectariferous organs referred to as “nectary leaves” and show diversity in shape, color and structure due to various positions and structure of nectary tissue. Menispermaceae are in the core Ranunculales and have green and short nectary leaves, but the knowledge on structure and functions of the nectary leaves is limited. We use scanning electron microscopy, light microscopy and transmission electron microscopy to investigate nectary leaves structure, micro-morphology and ultrastructure in two species of Stephania in Menispermaceae. Our results show that secretory tissues present in the upper part of abaxial side of the nectary leaves and the specialized secretory epidermal cells are distinguished from other cells. In Stephania cepharantha, clusters of secreting epidermal cells are raised slightly above other cells to form some “bulges” (8–25 cells arranged in a cluster) and connected to distinct huge sieve tube elements. In contrast, in Stephania japonica, secretory epidermal cells are lower than non-secreting cells and result in many “well-like” structures (comprising 6–20 cells per “well”), and have no sieve tube element connection. Secretory epidermal cells have dense cytoplasm, large nucleus and abundant organelles. Nectar secretions are exuded via micro-channels or pores of cuticle on outer walls. The type of secretory tissue in Stephania is the variant of nectarioles.
Plant Systematics and Evolution – Springer Journals
Published: May 30, 2018
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera