Lyon Arboretum Facility – FY 2009 Report

Objectives

  1. Propagation of all endangered Hawaiian plant taxa.
  2. Emphasis will be placed on propagating those critically endangered taxa for which propagation has not previously been attempted.
  3. A second attempt at propagation of those taxa for which earlier attempts at micropropagation have not been successful.
  4. Additional collections of those taxa that have been successfully propagated will be made in order to insure the widest possible sampling of the genetic diversity remaining in the wild population. Vegetative samples from all individuals in species, whose populations contain 50 or fewer individuals (Plant Extinction Prevention (PEP) species), will be collected unless large numbers of viable seed are being produced from open pollination and seedling regeneration is evident within the wild populations.

Performance

Objectives 1 and 3

Propagation of all endangered Hawaiian plant taxa;-Second attempt at propagation for taxa which earlier attempts at micropropagation have not been successful.

The Micropropagation Laboratory germplasm inventory includes 207 successfully propagated Hawaiian taxa belonging to 50 different plant families. Of these 207 Hawaiian taxa, 83 are listed as Threatened or Endangered by the State of Hawaii and the United States Fish and Wildlife Service. This involves establishment of gene banks of these plants in tissue culture or other in vitro conditions.

Objective 2

Emphasis will be placed on propagating those critically endangered taxa for which propagation has not previously been attempted.

Of the 207 successfully propagated taxa, 48 are critically endangered taxa included in the Plant Extinction Prevention program.

Objective 4

Additional collections of taxa that have been successfully propagated will be made in order to insure the widest possible sampling of the genetic diversity remaining in the wild population. Vegetative samples from all individuals in species, whose populations contain 50 or fewer individuals (Plant Extinction Prevention species), will be collected unless large numbers of viable seed are being produced from open pollination and seedling regeneration is evident within the wild populations.

Currently, there are 20, 889 plants within the germplasm inventory collection maintained at the Lyon Arboretum Micropropagation Laboratory and adjacent greenhouse and at the auxiliary Magoon Facilities site. The Micropropagation Laboratory program was assisted by an average of 6 volunteers a month for a total of 1120.3 hours this past fiscal year. The Micropropagation Laboratory program received 625 visitors this past fiscal year.