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develops hard seed coatedness. These results confirm the previous observations recorded by SrlARMAand SE~ (1974), BHATIAet al. (1977). After removal of dormancy the seeds germinated very quickly. Acknowledgements We are grateful to Dr. D. N. Sen for critically reviewing the mamtseript, to Prof. H. C. Arya for providing the facilities a n d to UGC, l~Iow Delhi, for granting a project to one of us (DD0).
REFERENCES BHATI, P. R., SEI% D. N.: Adaptive polymorphism in Ipomoea pes.tigridi8 (Convolvulaceae), a common rainy season weed of the I n d i a n arid zone. -- P l a n t Syst. Evol. 129 : 111--117, 1978a. "BHATI, P. R., SEI% D. N.: Temperature responses of seeds in Ipomoea pes.tigridis L. -- Biol. Plant. 20 : 221--224, 1978b. BH.CTIA, R. K., CrrAWAI% D. D., SEI% D. 1~.: E n v i r o n m e n t controlled seed d o r m a n c y in Cassia spp. -- Geobios 4 : 208--210, 1977. C~AWAIr D. D.: Role of high t e m p e r a t u r e pretrcatments on seed germination of desert species of Sida (Malvaceae). -- Oeeologia 6 : 343--349, 1971. CH~,WA~r, D. D., SF~, D. N. : Diversity in germination behaviour a n d high t e m p e r a t u r e tolerance in ttm seeds of Corchoru8 aestuans LII~N. -- Ann. Arid Zone 12 : 2 3 ~ 3 2 , 1973a. C~tAw~, D. D., SEI~, D. N.: Diversity in germination behaviour a n d chemical scarification for hard seed coat d o r m a n c y in Corchorus aestuans Lime. -- Brot6ria 4 ~, : 19--24, 1973b. MAYEa, A. M., SHAI~r, Y.: Control of seed germination. -- Annu. Rev. P l a n t Physiol. 25 : 167 to 193, 1974. SE~r, D. N.: E n v i r o n m e n t a n d Seed Germination of I n d i a n Plants. -- Chronica Botanica, Now Delhi 1977. SHARmA, N. K., SHARr~A, M. M., SEI% D. N.: Seed perpetuation in Rhynchosia capitata DO. -Biol. Plant. 20 : 225--228, 1978. S~,RMA, S. S., S~.1% D. hi.: A new report on secondary dormancy in certain arid zone seeds. -Curr. Sei. 43 : 386, 1974.
BOOK R E V I E W SMITIt, K . C. (ed.): PHOTOCH-EMYC~-L AlqD PHOq~OBIOLOGICAL Press, New Y o r k - - L o n d o n 1980. 316 pp. US $ 35.00.
R E V I E W S . VOLU~,IE 5.
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Plenum
F u r t h e r volume of the series which continues in publishing comprehensive reviews in all fields of photochemistry a n d photobiology, contains eight papers, but only two of t h e m are directly related to p l a n t biology. The review on photosynthetic phosphorylation b y chloroplasts of higher plants (R. E. McCarty) is based on 125 papers. I t describes the mechanism of photophosphorylation (chemiosmotie theory), its connection with the electron t r a n s p o r t chain, formation of electrochemical proton gradient, and functions of ATPase a n d other components of the mechanism. Next review (W. E n g e l m a n n a n d M. Sehrempf) deals with circadian r h y t h m s in euearyotic cells of plants, microorganisms and animals, their synchronization a n d temperature compensation. I n these r h y t h m s membranes are involved: m e m b r a n e models are thus the main topic of this paper Ca feedback model of chloroplast with thylakoid m e m b r a n e of Sweeney, a similar model of Njus, a coupled translation-membrane model of Schweiger, a ion.mediated translational model of Burgyone, etc.). F u r t h e r articles deal with fluorescent analysis of nacleic acids mad ehromatin, protein crosslinking to nuclem acids b y U. V. radiation, photobiochemistry in the dark (triplet states enzymatically generated, energy transfer to accepters in the dark, chemical excitation of photoreceptors, ere.), hypericism (sunlight sensitivity of skin following ingestion of plants containing hyperiein) a n d similar phenomena (fagopyrism, blepharisma), U.V. radiation a n d photocareinogens, a n d immunological detection of radiation damage in DNA. The volume is traditionally well-equipped, a n d it is provided with a Subject Index. Z. ~ES~Xr: (Praha)
