+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

A light-sensitive mutant in maize (Zea mays L.) I. Chlorophyll, chlorophyll-protein and ultrastructural studies

, : A light-sensitive mutant in maize (Zea mays L.) I. Chlorophyll, chlorophyll-protein and ultrastructural studies. Zeitschrift fur Pflanzenphysiologie 99(5): 417-426

A light-sensitive, conditional mutant of maize (Z. mays L.) is described. Under conditions which lead to maximum expression of the mutation, the mesophyll chloroplasts are characterized by high chlorophyll a/b ratios, and the virtual absence of light-harvesting chlorophyll a/b-protein (CPII). The proportion of P700 chlorophyll a-protein (CPI) remains relatively unchanged. Loss of chlorophyll a/b-protein is reflected in a concomittant loss of both associated polypeptides with MW of 23 and 25 kilodaltons. The mutant chloroplasts are characterized by a loss of extensive grana structure. The average number of thylakoids per granum is reduced from 4.8-1.2. Expression of the mutation is controlled by light intensity over the range 40 .mu.einsteins m-2s-1 (400-700 nm) to 475 .mu.einsteins m-2s-1. At lower light intensities the total chlorophyll content is reduced to approximately 60% of the wild-type, but pigment composition and ultrastructure appear normal. Intermediate light intensities produce intermediate characteristics. Expression of the mutation does not appear to be significantly affected by light quality or temperature. Further studies of this mutation and other alleles known at the same locus could prove useful in understanding both the genetic control and biochemical mechanisms involved in plastid differentiation.


DOI: 10.1016/S0044-328X(80)80157-7

Other references

Dicker, David., 1996: Ringing and bird observations at Keysworth in 1995. Stour Ringing Group Annual Report. April; 1995: 20-24

Späth, G., 1973: Intensive medicine. Cardial lung edema. Munchener Medizinische Wochenschrift 115(4): 125-127

Wixson B.G.; Gale N.L.; Downey K., 1977: Control of environmental contamination by cadmium, lead and zinc near new lead belt smelters. Conference on Trace Substances in Environmental Health (Missouri, University, Environmental Trace Substances Center), Proceedings: bia.. 11, Pages 455-461. 1977.

Kumpusalo, E., 2002: Abdominal pain in a young woman. Duodecim; Laaketieteellinen Aikakauskirja 116(5): 541,543-541,543

Fisher, M.M.; Snart, A.G., 1984: Nifedipine in ulnar artery occlusion. With the introduction of the calcium channel blocker, Nifedipine, potent peripheral vasodilatation has been demonstrated. Its main action is on the peripheral arterioles and venules with decreased peripheral resistance. Calcium affects most smooth...

Steinmann, B., 1943: Die Bedeutung der vege-tativen Struktur fiir die Entstehung des Bronchialasthmas. In 7 patients with bronchial asthma, respiratory minute volume, elasticity of the aorta, circulatory peripheral resistance, blood pressure, basal metabolism, and arterial-venous O2-difference were detd. in attack free intervals. In all those patie...

Turkevich, O.M.; Daniliuk, S.I.; Shaposhnikov, V.S., 1969: Eleutherococcal extract in the treatment of patients with psychoses and marginal states of sematogenous origin. Vrachebnoe Delo 7: 104-106

Shankaraiah, C.; Nagaraju, M.S.; Gururaj Hunsigi, 2002: Ratooning in sugarcane. Ratooning is discussed as an important means of achieving cost effectiveness in sugarcane production. The restricted root system and excessive tillering followed by high mortality in the early stages of ratooning, as well as the pest and pathogens...

Anonymous, 2015: Correction. American Journal of Clinical Pathology 143(5): 760-760

Bignold, L.P., 2007: Variation, "evolution", immortality and genetic instabilities in tumour cells. The pathological characteristics of tumour cells often include variation of their histopathological features (i.e. "degrees of de-differentiation") between cases of the same tumour type and between different foci within individual tumour...