Procedure for mass-production of Neurospora tetrasperma ascospores

Wall Structure of Ascospores of Neurospora Tetrasperma

BOURRELLY, P. 1956. Initiation pratique a la systematique des algues d'eau douce. Bull. Micr. Appliq, ser. 2, 6: 122-141. CAVE, MARION S. AND MARY A. POCOCK. 1951a. The acetocarmine technique applied to the colonial Volvocales. Stain Tech. 26: 173-174. --AND ---. 1951b. Karyological studies in the Volvocales. Amer. Jour. Bot. 38: 800-811. -AND ---. 1956. The variable chromosome number in Astrep...

Nuclear orientation in the ascospores of Neurospora tetrasperma.

OUR successive nuclear divisions occur during ascus development in Neurospora tetrasperma. The first two divisions are meiotic; the last two, mitotic. Previous cytological studies of ascus development have emphasized primarily the importance of the second and third divisions, during which rather elaborate mechanisms of nuclear movement provide that descendants of each of the two nuclei separate...

Changes in the Permeability of Ascospores of Neurospora Tetrasperma during Germination

The respiration and germination of activated ascospores of Neurospora tetrasperma have been shown to be almost completely inhibited by concentrations of ethylene diaminetetraacetic acid (EDTA) as low as 0.0035 M. In contrast, however, dormant ascospores are insensitive to this chelating agent. At any time up to about 150 minutes after activation Ca(++) or Mg(++) can completely reverse this toxi...

The Reversible Heat Activation Inducing Germination and Increased Respiration in the Ascospores of Neurospora Tetrasperma

The heat activation of Neurospora tetrasperma ascospores is a reversible process, since activated spores may be returned to secondary dormancy by preventing respiration, and these secondarily dormant spores may be induced to germinate by reheating. Activation of the spores brings about a large increase in respiration prior to the germination of the spores. As the spores are reversibly activated...

The Terminal Respiratory Enzymes in Neurospora Tetrasperma.