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Defoliation affects chemical defenses in all plant parts of rye seedlings


, : Defoliation affects chemical defenses in all plant parts of rye seedlings. Journal of chemical ecology 25(3): 491-499

The effect of defoliation and consecutive defoliation (condefoliation) of rye seedlings on the allocation patterns of biomass and hydroxamic acids (Hx) was evaluated five days after treatment. Growth of condefoliated seedlings was lower than that of defoliated and nondefoliated ones. Concentration of Hx decreased in shoots of condefoliated seedlings compared to nondefoliated ones, while concentration of Hx in root exudates increased. Allocation of Hx to roots and root exudates increased at the expense of allocation to the shoots in condefoliated seedlings. The ratio of Hx-aglucone to Hx-glucoside was higher in shoots of defoliated and condefoliated seedlings. The decrease in quantity of defense in shoots was accompanied by an increase in its quality, given that aglucones are more toxic than glucosides. The increase in concentration of Hx--an allelopathic compound also involved in mineral uptake by roots--in root exudates of condefoliated seedlings was suggested to lead to an advantage in the acquisition of resources for the regeneration of lost biomass.

US$19.90

DOI: 10.1023/a:1020945602297


Other references

Munn, Charles A., 1995: The bigger they are the harder they fall, or how body size affects the conservation status of New World parrots. Psitta Scene. May; 72: 1-5

Cruickshank, I.; Perrin, D., 1971: Studies on phytoalexins. XI. The induction, antimicrobial spectrum and chemical assay of phaseollin. Journal of Phytopathology 70(3): 209-227

Wright, R.H.; Chambers, D.L.; Keiser, I., 1971: Insect attractants, anti-attractants, and repellents. Anti-attractants, defined as substances with little or no intrinsic repellency but with the property of diminishing the attractiveness of a lure, were predicted on spectroscopic grounds, and their existence was demonstrated in experiments with Cer...

Maddox G.L., 1987: Psychosocial perspectives on aging. Riley, M W , J D Matarazzo And A Baum (Ed ) Perspectives in Behavioral Medicine: The Aging Dimension Xv+187p Lawrence Erlbaum Associates, Inc , Publishers: Hillsdale, New Jersey, Usa; London, England, Uk Illus 15-28

Watanabe T., 1990: Relative dating methods mainly applied to glacial and periglacial deposits. Quaternary Research (Tokyo) 29(1): 49-77

Li, P.; Dong, X.; Gao, Y.; Ren, L.; Jin, K., 2016: Photocarrier transport and dynamics in mixed-phase BiFeO<sub>3</sub> films. We report a remarkable photoinduced relaxation process and its dependence of thickness and temperature in mixed-phase BiFeO<sub>3</sub> films grown on (001) LaAlO<sub>3</sub> substrates. When the films are illuminated by th...

Desrumaux, B.; Sedeyn, P.; Werbrouck, A.; Lannoy, P., 1997: Mushrooms. Raising yields by supplementary manuring. Ready-spawned compost was supplemented with Champfood, Champlus-For, Millichamp 3000 or Substradd Forte (details of N and protein content given), or not, at 1 kg/msuperscript 2 (11.1 kg/t compost), a few days before casing, in trials at the Provin...

Aoki, M.; Iwayama, Y.; Yata, N., 1962: Colorimetric determination of organic bases using sulfonphthalein dyes. Yakugaku Zasshi 82: 918-921

Delp, M.D.; Evans, M.V.; Duan, C., 1998: Effects of aging on cardiac output, regional blood flow, and body composition in Fischer-344 rats. The purpose of this study was to determine the effects of maturation and aging on cardiac output, the distribution of cardiac output, tissue blood flow (determined by using the radioactive-microsphere technique), and body composition in conscious...

Ling, C.C.; Hsu, T.C.; Shih, S.C.; Kao, C.R.; Chou, S.Y.; Huang, S.H., 1994: Inflammatory fibroid polyp of the jejunum causing intussusception: a case report. Inflammatory fibroid polyp is a rare benign lesion of the gastrointestinal tract. This report concerns a 56-year-old female who presented with intermittent abdominal pain, vomiting and diarrhea; she had had partial intestinal obstruction over a pe...