Access to fixed or available forms of nitrogen limits the productivity of crop plants and thus
food production. Nitrogenous fertilizer production currently represents a significant expense …

Background Nitrogen is an essential nutrient in plant growth. The ability of a plant to supply
all or part of its requirements from biological nitrogen fixation (BNF) thanks to interactions …

Cannabis sativa has been employed for thousands of years, primarily as a source of a stem
fiber (both the plant and the fiber termed “hemp”) and a resinous intoxicant (the plant and its …

• Premise of the study: Recent analyses employing up to five genes have provided
numerous insights into angiosperm phylogeny, but many relationships have remained …

We present an integrative model predicting associations among epiphytism, the tank habit,
entangling seeds, C 3 vs. CAM photosynthesis, avian pollinators, life in fertile, moist …

Friedman WE, RC Moore, and MD Purugganan. 2004. The evolution of plant development.
Am. J. Bot. 91: 1726–1741. Friis EM, PR Crane, and KP Pedersen. 1997. Fossil history of …

Human utilization of the mulberry–silkworm interaction started at least 5,000 years ago and
greatly influenced world history through the Silk Road. Complementing the silkworm …

A revised and updated classification for the families of the flowering plants is provided.
Newly adopted orders include Austrobaileyales, Canellales, Gunnerales, Crossosomatales …

The current classification of angiosperms is based primarily on concatenated plastid
markers and maximum likelihood (ML) inference. This approach has been justified by the …

Despite intensive morphological and molecular studies of Onagraceae, relationships within
the family are not fully understood. One drawback of previous analyses is limited sampling …