Abscisic Acid and Related Compounds

Moore, Thomas C.

doi:10.1007/978-1-4612-3654-2_5

Cited by 2 publications

(1 citation statement)

References 108 publications

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“…The independent function of ABA also was attributed to its role in accelerating senescence which triggers physiological events more directly responsible for abscission [10,21] . Based on our experiments with R. sinica, all aspects of ABA-induced abscission did not appear to be mediated through ethylene [3,14,21] . Suttle and Abrams [23] attempted to solidify the relationship between ABA and ethylene by invoking a `permissive role' for ethylene in ABAinduced abscission and the need for undetected basal levels of ethylene synthesis to facilitate ABA activity .…”

Section: Discussionmentioning

confidence: 99%

Abscisic acid- and ethylene-induced defoliation of Radermachera sinica L.

1994

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Radermachera sinica L . is an ornamental plant with demonstrated sensitivity to ethylene-induced leaf abscission . In this study, we examine the relationship between abscisic acid (ABA) and ethylene in initiating the abscission response . Treatment with 1 tl L-1 of ethylene, 1 mM 1-aminocyclopropane-l-carboxylic acid (ACC) or 1 mM ABA resulted in complete defoliation of leaf explants . Application of 0 .125 mM silver thiosulfate (STS) inhibited ethylene-and ACC-induced abscission but had no effect on explants treated with ABA . The ABA-induced abscission was unaffected by treatment with aminoethoxyvinylglycine (AVG) or aminooxyacetic acid (AOA) . Treatment of explants with 1 mM cobalt chloride (CoC12) or 2000 µl L -1 of norbornadiene (NBD) completely inhibited abscission in explants treated with 1 ttl L-1 ethylene or 1 mM ACC but they were only marginally effective in blocking ABAinduced abscission despite the lower level of endogenous ethylene . ABA appeared to increase the sensitivity of explants to ethylene . However, the evidence suggests that ABA may also function independent of ethylene to induce leaf abscission in R. sinica .Abbreviations: ABA = abscisic acid ; ACC = 1-aminocyclopropane-l-carboxylic acid ; AOA = aminooxyacetic acid ; AVG = aminoethoxyvinylglycine ; CoC12 = cobalt chloride; NBD = norbornadiene ; STS = silver thiosulfate . 243

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Section: Discussionmentioning

confidence: 99%

Abscisic acid- and ethylene-induced defoliation of Radermachera sinica L.

1994

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The Biological and Structural Similarity between Lunularic Acid and Abscisic Acid

Yoshikawa

Ichiki

Sakakibara

et al. 2002

Bioscience, Biotechnology, and Biochemistry

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Lunularic acid (LA) inhibited not only the germination and the growth of cress and lettuce at 1 mM but also the gibberellic acid (GA3)-induced alpha-amylase induction in embryoless barley seeds at 120 microM, which was recognized as a specific activity of abscisic acid (ABA). Moreover LA and ABA equally inhibited the growth of Lunularia cruciata A18 strain callus at 40 and 120 microM. A computational analysis revealed that the stable conformers of LA could be superimposed on the stable ABA conformers. In addition, the antibody raised against the conjugate of C1-ABA-bovine serum albumin (ABA-BSA) reacted with LA-horse-radish peroxidase (LA-HRP) conjugate as well as ABA-HRP conjugate, apparently. These results can explain why LA has ABA-like activity in higher plants. Moreover the results suggest that LA and ABA bind to the same receptor in higher plants.

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Abscisic Acid and Related Compounds

Cited by 2 publications

References 108 publications

Abscisic acid- and ethylene-induced defoliation of Radermachera sinica L.

Abscisic acid- and ethylene-induced defoliation of Radermachera sinica L.

The Biological and Structural Similarity between Lunularic Acid and Abscisic Acid

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