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Journal ArticleDOI

Effects of toxic concentrations of natrium fluoride on growth and enzyme activities of rice ( Oryza sativa L.) and jute ( Corchorus olitorius L.) seedlings

01 Jan 1982-Biologia Plantarum (Springer Netherlands)-Vol. 24, Iss: 1, pp 34-38
TL;DR: Germination was increasingly inhibited at concentrations above 5 and 20 mM and stopped altogether at 80 and 50 mM NaF in rice and jute respectively, whereas the inhibition of seedling growth began at much lower concentrations.
Abstract: Germination was increasingly inhibited at concentrations above 5 and 20 mM and stopped altogether at 80 and 50 mM NaF in rice and jute respectively, whereas the inhibition of seedling growth began at much lower concentrations. Of the enzymes, RNase activity was increased by fluoride, while α-amylase, protease, phytase and ATPase activities exhibited distinct inhibition from the control.
References
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Book
01 Jan 1982
TL;DR: In his Friday evening discourse at the Royal Institution on November 3, Sir Arthur Hill discussed the many ingenious devices for the protection of the seed and equally ingenious arrangements for the escape of the embryo on germination, which are found in plants.
Abstract: Provides a comprehensive overview of the physiology, biochemistry and ecology of the process of seed germination. This revised edition includes extended coverage of the influence of molecular biology on seed science and a new chapter on seed technology and propagation.

1,083 citations

Book
01 Jun 1975
TL;DR: In this paper, the effects of air pollution both individually and synergistically on the higher and lower plant groups are discussed from the subcellular level to entire ecosystems, and cover anatomy, pathology and biochemistry of plants in relation to air pollution.
Abstract: This volume details the effects of air pollutants both individually and synergistically on the higher and lower plant groups. Discussions range from the subcellular level to entire ecosystems, and cover anatomy, pathology and biochemistry of plants in relation to air pollution. Sources and costs of air pollution are overviewed, as are the mechanisms of injury. SO/sub 2/, ozone, fluorides, PAN, nitrogen oxides and particulates are all treated in detail. Interactive and system-level effects are also discussed. There are 14 chapters for which analytics have been done.

270 citations

Book ChapterDOI
01 Jan 1984
TL;DR: The nature of the pre-quiescence embryo bears very heavily on early germination behaviour and its control, and answers to questions relating to Germination behaviour are increasingly being sought during the period of seed development.
Abstract: Knowledge of the mature seed and its germination is of importance in the study of seed formation Indeed, embryogeny and germination are extensions of each other separated by a period of relative metabolic inactivity called quiescence, and are essentially different phases of the continuing process of embryo growth and development Obviously, the nature of the pre-quiescence embryo bears very heavily on early germination behaviour and its control, and answers to questions relating to germination behaviour are increasingly being sought during the period of seed development

204 citations

Journal Article
TL;DR: Satellites can give farmers, scientists and policy makers important knowledge of how air quality affects food security, enabling more informed decision-making to ensure access to food resources.
Abstract: As shown in an early field study in the 1970s, ozone-sensitive varieties of potatoes (left rows) show reduced growth and lower yields than ozone-tolerant varieties (right rows). While its effects are often overlooked, air pollution negatively impacts crops around the world, resulting in significant economic losses, with the greatest economic loss occurring in the United States. Satellites can give farmers, scientists and policy makers important knowledge of how air quality affects food security, enabling more informed decision-making to ensure access to food resources.

140 citations

Journal ArticleDOI
TL;DR: The results provide a relatively complete description of the over-all aspects of phosphorus metabolism associated with germination of oats.
Abstract: An investigation has been made of the changes in the major phosphorus containing substances in Avena sativa during the first 8 days of dark germination. The endosperm, roots, and shoots were analyzed separately for acid soluble-P, phytic acid-P, inorganic-P, lipid-P, nucleic acid-P, and protein-P. Phytic acid-P comprised 53% of the total seed phosphate, while the sum of lipid-P, nucleic acid-P and protein-P comprised 27% of the seed phosphate. All these reserve phosphate materials were mobilized and transferred to the developing axis. The phosphate from phytic acid appeared almost entirely as inorganic-P in the roots and shoots. A close stoichiometry existed between the rate of loss of nucleic acid-P from the endosperm and its rate of appearance in the roots and shoots. Thus no net synthesis of nucleic acid occurred during the 8-day period examined. The rate of synthesis of lipid-P in the roots and shoots exceeded its rate of disappearance from the endosperm during the first 4 days of germination. Protein-P increased in the roots and shoots during germination, but at a rate less than its rate of disappearance from the endosperm. The results provide a relatively complete description of the over-all aspects of phosphorus metabolism associated with germination of oats.

97 citations