1. Structural aspects of vectorial electron transfer in photosynthetic reaction centers

   • Paul Mathis

   Minireview Pages: 97 - 111

2. In vitro enzyme activities and products of ¹⁴CO₂ assimilation in flag leaf and ear parts of wheat (Triticum aestivum L.)

   • H. B. Singal
   • I. S. Sheoran
   • Randhir Singh

   Regular Paper Pages: 113 - 122

3. RuP₂ pool size indicated by CO₂ assimilation following the abrupt loss of light

   • J. W. Cary
   • G. E. Kleinkopf

   Regular Paper Pages: 123 - 132

4. Effect of light intensity on pigments and main acyl lipids during ‘natural’ chloroplast development in wheat seedlings

   • W. Lechowicz
   • K. Maternicka
   • J. Poskuta

   Regular Paper Pages: 133 - 147

5. Variation in the polypeptide composition of phycobilisomes from Anacystis nidulans and three pigment mutants

   • Rita Khanna
   • Jo-Ruth Graham
   • Elisabeth Gantt

   Regular Paper Pages: 149 - 159

6. Freezing damage and frost tolerance of the photosynthetic apparatus studied with isolated mesophyll protoplasts of Valerianella locusta L.

   • Susanne Rumich-Bayer
   • G. Heinrich Krause

   Regular Paper Pages: 161 - 174

7. Effects of water stress on the gas exchange, the activities of some enzymes of carbon and nitrogen metabolism, and on the pool sizes of some organic acids in maize leaves

   • Thomas W. Becker
   • Heinrich P. Fock

   Regular Paper Pages: 175 - 181

8. Relative optical cross-section of the two photosystems during the life cycle of Chlorella

   • Peter Butko

   Short Communication Pages: 183 - 185

9. CO₂ enrichment in vitro. Effect on autotrophic and heterotrophic cultures of Nicotiana tabacum (var. Samsun)

   • Marianne Mousseau

   Short Communication Pages: 187 - 191