Legume plants host nitrogen-fixing endosymbiotic Rhizobium bacteria in root nodules. In Medicago truncatula, the bacteria undergo an irreversible (terminal) differentiation mediated by hithertoâ€¦ (More)

A new genus g = g(X, E) is defined for the pairs (X, E) that consist of n-dimensional compact complex manifolds X and ample vector bundles E of rank r less than n on X. In case r = n âˆ’ 1, g is equalâ€¦ (More)

Let E be an ample vector bundle of rank r on a projective variety X with only log-terminal singularities. We consider the nefness of adjoint divisors KX + (t âˆ’ r) detE when t â‰¥ dimX and t > r. As aâ€¦ (More)

Some classification results for ample vector bundles of rank 2 on Hirzebruch surfaces, and on Del Pezzo surfaces, are obtained. In particular, we classify rank-2 ample vector bundles with c2 lessâ€¦ (More)

Introduction. Let L be an ample line bundle on a complex projective manifold M of dimension n â‰¥ 2. The sectional genus g = g(M, L) of a polarized manifold (M, L) is defined by the formula 2g(M, L) âˆ’â€¦ (More)

Peter Mergaert, ' WillemVandeVelde, +12 authorsBen Pariot

2010

The symbiotic cells of legume nodules house large numbers of nitrogen-fixing, differentiated rhizobia, called bacteroids. In the legume Medicago truncatula, the symbiotic cells provoke terminalâ€¦ (More)