  The understanding of planet formation has changed recently, embracing the new
idea of pebble accretion. This means that the influx of pebbles from the outer
regions of planet-forming disks to their inner zones could determine the
composition of planets and their atmospheres. The solid and molecular
components delivered to the planet-forming region can be best characterized by
mid-infrared spectroscopy. With Spitzer low-resolution (R=100, 600)
spectroscopy, this approach was limited to the detection of abundant molecules
such as H2O, C2H2, HCN and CO2. This contribution will present first results of
the MINDS (MIRI mid-IR Disk Survey, PI: Th. Henning) project. Due do the
sensitivity and spectral resolution (R~1500-3500) provided by JWST we now have
a unique tool to obtain the full inventory of chemistry in the inner disks of
solar-types stars and brown dwarfs, including also less abundant hydrocarbons
and isotopologues. The Integral Field Unit (IFU) capabilities enable at the
same time spatial studies of the continuum and line emission in extended
sources such as debris disks, the flying saucer and also the search for mid-IR
signatures of forming planets in systems such as PDS70. These JWST observations
are complementary to ALMA and NOEMA observations of the outer disk chemistry;
together these datasets provide an integral view of the processes occurring
during the planet formation phase.
