Changes in Distribution of Acid-Phosphatase Activity During Wound Regeneration in<i>Coleus</i>

Jones, Danny; Villiers, T. A.

doi:10.1093/jxb/23.2.375

Cited by 9 publications

(1 citation statement)

References 8 publications

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“…Developmental processes that cause AcPase induction include seed germination (Gibson and Ullah 1988), flowering and senescence (De Leo and Sacher 1970;Lal and Jaiswal 1988), greening of etiolated seedlings (Christeller and Tolbert 1978) and fruit ripening (Kanellis et al 1989). Environmental factors that elicit increased expression of AcPases include: salt stress (Pan 1987), water deficit (Barret-Lennard et al 1984), phosphorus starvation (Lefebvre et al 1990), wounding (Jones andVilliers 1972), hypersensitive response (HR) (Kenton et al 1999).…”

Section: Acid Phosphatase Localization In Pea Nodulesmentioning

confidence: 99%

Localization of acid phosphatase activity in the apoplast of root nodules of pea (Pisum sativum)

2011

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Changes in the activity of acid phosphatase (AcPase) in the apoplast of pea root nodule were investigated. The activity was determined using lead and cerium methods. The results indicated a following sequence of AcPase activity appearance during the development of the infection thread: 1) low AcPase activity appears in the outer part of cells of symbiotic bacteria; 2) bacteria show increased AcPase activity, and the enzyme activity appears in the thread walls; 3) activity exhibits also matrix of the infection thread; 4) bacteria just before their release from the infection threads show high AcPase activity; 5) AcPase activity ceases after bacteria transformation into bacteroids. The increase in bacterial AcPase activity may reflect a higher demand for inorganic phosphorus necessary for propagation of the bacteria within the infection threads and/or involved in bacteria release from the infection threads.

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Section: Acid Phosphatase Localization In Pea Nodulesmentioning

confidence: 99%

Localization of acid phosphatase activity in the apoplast of root nodules of pea (Pisum sativum)

2011

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Tissue Electropotentials in Kalanchoë Blossfeldiana During Wound Healing

Gensler

1978

American J of Botany

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Penetrating palladium probes were placed in the stem and leaf of Kalancho'ë blossfeldiana. The electropotentials arising in the probes at the wound site were continuously monitored during the subsequent healing process. The potential change was always in the positive going direction, beginning at an average of 320 millivolts and stabilizing at an average of 601 millivolts relative to a standard hydrogen electrode. The healing process can be divided into two distinct phases: an initial phase of approximately 6 hr duration in which the potential rises rapidly and a second phase extending to approximately dusk on the third day in which the potential rises at a substantially lower rate. There is also a definite change of the transition potential waveshape at the beginning and end of the 16‐hr light period during the healing process. Rewounding results in a potential recovery waveshape similar to the original healing response but of shorter duration. The data are interpreted in terms of the redox status of the wound site.

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Acid phosphatase in the tubers of Dioscorea species and its purification from the white yam (D. rotundata poir)

1988

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Acid phosphatase activity was determined in 15 cultivars from four species of yam. A 12-fold purification of the enzyme from Dioscorea rotundata (cv. chikakwondo) gave a homogeneous preparation as demonstrated by polyacrylamide gel electrophoresis. This enzyme preparation has an apparent molecular weight of 115 000 +2000 and an optimum activity at a p H of 5-20 and a temperature of 50°C. The K, ofthe enzyme is 3.81 m M with disodium p-nitrophenylphosphate (p-NNP) as a substrate. The energy of activation, heat of activation, energy of inactivation and heat of inactivation are 7.0, 6.4, 4.41 and 4.34 kcal M -~, respectively. Although it has very little activity with most organic phosphoric acid esters, it is significantly inhibited by Ca2+, Hg2+ and EDTA and activated by Mgz+.The enzyme has a half-life of 50,170r 13 days, respectively, when stored at W C , 0°C or room temperature (29+2"C).

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Changes in Distribution of Acid-Phosphatase Activity During Wound Regeneration inColeus

Cited by 9 publications

References 8 publications

Localization of acid phosphatase activity in the apoplast of root nodules of pea (Pisum sativum)

Localization of acid phosphatase activity in the apoplast of root nodules of pea (Pisum sativum)

Tissue Electropotentials in Kalanchoë Blossfeldiana During Wound Healing

Acid phosphatase in the tubers of Dioscorea species and its purification from the white yam (D. rotundata poir)

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