Effects of radiation on marine algae

Induced Physical Mutagenesis and its Effect in Cytological Behavior of Ashwagandha (<i>Withania somnifera</i> (L.) Dunal)

“…Such a phenomenon has been attributed to changes in hormonal levels such as auxins and ascorbic acid. Physiological and biochemical disturbances (Gunckel, 1954, Singh, 1974, change in enzyme activity and impaired mitosis in the meristematic zone of growing seedlings (Blinks, 1952). Similar results were suggested that it might also be due to a decrease in respiratory quotient in irradiated seedlings (Woodstock and Justics, 1967).…”

“…The reduction in seedling height is due to the changes in hormonal levels such as auxins and ascorbic acid: physiological and biochemical disturbances (Gunckel, 1954, Singh, 1974; changes in enzyme activity and impaired mitosis in the meristamatic zone of growing seedlings. The similar results were suggested that it might also be due to a decrease in respiratory quotient in the irradiated seedlings (Blinks, 1952). In respect of gamma rays treatment, there was a proportionate reduction in germination of Andrographis paniculata with increased doses of gamma rays (Shroni, 2013) The chromosome number of the Ashwagandha plant is 2n = 48 (Iqbal and Datta physiological damage besides gene and chromosomal changes.…”

Trophic Structure and Productivity of a Windward Coral Reef Community on Eniwetok Atoll

“…By this view the radioactive elements in the polyps are not of the type which are released by the corals during their daily metabolic cycles. Cerium and praesodymium have been strongly implicated as main components to previous reef radioactivity (Blinks 1952;Donaldson et al 1950). Apparently the calcophile elements like calcium and strontium are not retained but rapidly exchanged away by the high non-radioactive concentrations in the flux of sea water over the reef.…”

Excitation‐contraction coupling in skeletal muscle fibers injected with the InsP3blocker, heparin

“…The low sensitivity and inconsistent response of skinned skeletal muscle fibres to applied InsP3 [25], the very slow contractions evoked by photolytic release of InsPs [25], the lack of response of intact (not skinned) frog skeletal muscle fibres to injected InsP3 [26], the low enzyme activity for degradation of InsP3 [27], and the failure reported here of heparin to inhibit Ca2+ release from the SR constitute a significant body of evidence against the hypothesis that InsP3 is the chemical messenger of E-C coupling in skeletal muscle. It might be argued that this negative evidence does not conclusively rule out a messenger role.…”