Biochemistry of a plant dormancy process: Prospects for chemical regulation

Mousdale, David M.; Mousdale, Sandra A.; Hennerty, M. J.

doi:10.1007/bf02885311

Cited by 7 publications

(6 citation statements)

References 29 publications

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“…After an initial decline in protein concentration during the first 200 to 300 CH, root protein concentrations exhibited a similar although slightly delayed response to chilling. Similar patterns of protein accumulation followed by mobilization of those reserves have been reported in shoot bark of apple (Mousdale, 1983b;Mousdale et al, 1986;Tromp and Ovaa, 1971) and Morus alba (Suzuki, 1984). In apple, the mobilization of protein reserves has been shown not to depend strongly on the demand for N by the bud (Tromp and Ovaa, 1971).…”

supporting

confidence: 71%

“…Remobilization of these reserves often accompanies active growth of overwintering buds in the spring, but it does not depend on this growth (Tromp and Ovaa, 1971). A scheme for regulation of bark protein levels by seasonal variations in endogenous abscisic acid (ABA) concentration has been proposed (Mousdale, 1982(Mousdale, , 1983a(Mousdale, , 1983bMousdale et al, 1986). While information on shoot bark proteins is available Titus, 1980a, 1980b;O'Kennedy and Titus, 1979), nothing is known about protein changes in the roots in response to chilling.…”

mentioning

confidence: 99%

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Growth and Protein Content of Apple in Response to Root and Shoot Temperature following Chilling

Arnold¹,

Young²

1990

HortSci

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Bare-root Malus × domestica Borkh. seedlings were chilled for 0, 600, 1200, or 1800 hours at 5C (CH). Seedlings were then placed with roots and/or shoots in all combinations of 5 and 20C forcing conditions (FC) for up to 21 days. Virtually no growth occurred at 5C FC. When the whole plant was forced at 20C, all measures of root and shoot growth increased in magnitude, occurred earlier and at a faster rate with increasing CH. Thus, roots and shoots responded similarly to chilling. When shoots or roots were subjected to 20C FC, while the other portion of the plant was at 5C, the responses were reduced in magnitude and delayed. However, the overall growth enhancement by chilling was not negated. Root and shoot growth enhancement by chilling appeared to be increased if the other portion of the plant was actively growing also, but not dependent on it. Growth of adventitious shoots on roots (root suckers) was greatly enhanced with increasing CH on plants subjected to 5C shoot and 20C root FC. While total root and shoot bark protein levels on a per-seedling basis were similar, protein concentrations were lower in root bark than in shoot bark. During chilling, total protein per seedling generally increased until just before the time that chilling requirements for vegetative budbreak were satisfied. Protein degradation then began, resulting in lower protein levels through 2300 CH. Rapid protein breakdown (1200 to 1800 CH, roots; 1000 to 1800 CH, shoots) occurred at about the same time that root (1000 to 1800 CH) and shoot (800 to 1800 CH) growth responses to chilling were increasing. Warm FC resulted in increased protein breakdown with increased CH and forcing time.

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supporting

confidence: 71%

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confidence: 99%

Growth and Protein Content of Apple in Response to Root and Shoot Temperature following Chilling

Arnold¹,

Young²

1990

HortSci

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“…For cold-requiring seeds, buds, bulbs and tubers there are as yet no data available on the effect of a reduction of the ABA-contenl on dormancy development (Powell 1987). The reported correlation of tlie measured level of endogenous ABA and dormancy is not strict (Mousdale et al 1986, Powell 1987, Zeevaart and Creelman 1988, Qatnaruddin et al 1993). The present study shows unambiguously that in lily bulblets a threshold level of endogenous ABA is required for tiie development of dormancy: fluridone prevented the development of dormancy (Fig.…”

Section: Discussionmentioning

confidence: 99%

Abscisic acid controls dormancy development and bulb formation in lily plantlets regenerated in vitro

Kim¹,

Davelaar

Klerk³

1994

Physiologia Plantarum

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Plantlets of lily regenerated in vitro from scale explants consist of scales and leaves from which the base of the petiole has swollen to a scale. Fluridone, an inhibitor of ABA‐synthesis, applied during culture in vitro, inhibited the swelling of the petioles and promoted leaf formation. At high fluridone concentrations (10 or 33μM), swelling was completely blocked, and plantlets consisted of leaves only. Addition of ABA during the regeneration in vitro had the opposite effect and resulted in plantlets with scales only. When applied simultaneously with fluridone, ABA nullified the effect of fluridone. This demonstrates that bulb formation in lily is under the control of ABA. Lily plantlets regenerated in vitro on scale explants at 20 or 25°C were harvested after 11 weeks, and the leaves were removed from the bulblets. The bulblets were dormant and required a cold treatment to achieve rapid emergence after planting in soil. Fluridone added during the culture in vitro prevented the development of dormancy, and the bulblets did not require a cold treatment. The effect of fluridone was nullified by simultaneous addition of ABA. Bulblets harvested after 6 weeks of culture at 20°C had not yet developed dormancy. Bulblets regenerated at 15°C were only slightly dormant. In both types of bulblets, it is unlikely that the lack of dormancy was due to low ABA‐levels since addition of ABA did not affect the dormancy status. These data indicate that the level of endogenous ABA and an unknown additional factor play major roles in the development of dormancy.

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“…However, the 54 terms found in the literature (Table 1) contribute not only to duplication and equiv ocal meaning, but certain individual terms have been used for different types of dor mancy (see refs. 15,26,28,37,44,47,59). Saure (60) noted that " the usage of certain terms varies among authors," and Nikolaeva (45) lamented the " great number of concepts and terms having quite vague and sometimes simply incorrect meanings."…”

mentioning

confidence: 99%

“…Of the more prominent terms in use today, " quiescence" appears to be the most inher ently confusing. Besides its general use to mean " no growth due to unfavorable envi ronmental conditions," it also has been used synonymously with correlated inhibitions (28,37,47), winter dormancy (44), the failure to grow in a favorable environment (26), the second stage of dry weight increase in peach fruit (10), and as a histological zone in ap ices. Clearly, " quiescence" is not defini tive.…”

mentioning

confidence: 99%

Endo-, Para-, and Ecodormancy: Physiological Terminology and Classification for Dormancy Research

Lang

Early

Martin

et al. 1987

horts

615

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Plant dormancy has a major impact on the cultivation of plants, influencing such processes as seed germination, flowering, and vegetative growth. The diversity of plant tissues that exhibit, or contribute to the manifestation of, dormancy is great, and there appear to be numerous mechanisms of dormancy induction or release. This complexity was discussed by Romberger (55) nearly 25 years ago. Yet his analysis of the unresolved challenges in dormancy research is still valid today, for the overall understanding of dormancy is limited. This lack of understanding may be due, in part, to the abundance of terminology that has arisen without a nomenclatural framework in which to classify and relate the events being described.

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Biochemistry of a plant dormancy process: Prospects for chemical regulation

Cited by 7 publications

References 29 publications

Growth and Protein Content of Apple in Response to Root and Shoot Temperature following Chilling

Growth and Protein Content of Apple in Response to Root and Shoot Temperature following Chilling

Abscisic acid controls dormancy development and bulb formation in lily plantlets regenerated in vitro

Endo-, Para-, and Ecodormancy: Physiological Terminology and Classification for Dormancy Research

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