𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Responsiveness ofAmaranthus retroflexusseeds to ethephon, 1-aminocyclopropane 1-carboxylic acid and gibberellic acid in relation to temperature and dormancy

✍ Scribed by J. Kepczynski; F. Corbineau; D. Côme

Publisher
Springer Netherlands
Year
1996
Tongue
English
Weight
511 KB
Volume
20
Category
Article
ISSN
0167-6903

No coin nor oath required. For personal study only.

✦ Synopsis

Dormant Amaranthus retro$exus seeds do not germinate in the dark at temperatures below 35 'C. Fully dormant seeds germinate only at 35-40 "C whereas non-dormant ones germinate within a wider range of temperatures (15 to 40 "C). Germination of non-dormant seeds requires at least 10% oxygen, but the sensitivity of seeds to oxygen deprivation increases with increasing depth of dormancy. 10m6 to 10m4 M ethephon, 10m3 M 1-aminocyclopropane I-carboxylic acid (ACC) and 10m3 M gibberellic acid (GAs) break this dormancy. In the presence of lop3 M GA3 dormant seeds are able to germinate in the same range of temperatures as non-dormant seeds. The stimulatory effect of GA3 is less dependent on temperature than that of ethephon, while ACC stimulates germination only at relatively high temperatures (25-30 "C). The results obtained are discussed in relation to the possible involvement of endogenous ethylene in the regulation of germination of A. retrojlexus seeds.

📜 SIMILAR VOLUMES

Changes in 1-(malonylamino)cyclopropane-
Changes in 1-(malonylamino)cyclopropane-1-carboxylic acid content in wilted wheat leaves in relation to their ethylene production rates and 1-aminocyclopropane-1-carboxylic acid content
✍ Neil E. Hoffman; Yu Liu; Shang Fa. Yang 📂 Article 📅 1983 🏛 Springer-Verlag 🌐 English ⚖ 524 KB

In excised wheat (Triticum aestivum L.) leaves, water-deficit stress resulted in a rapid increase, followed by a decrease, in ethylene production rates and in the levels of l-aminocyclopropane-l-carboxylic acid (ACC), the immediate precursor of ethylene. However, the level of Nmalonyl-ACC (MACC), th

Apical localization of 1-aminocyclopropa
Apical localization of 1-aminocyclopropane-1-carboxylic acid and its conversion to ethylene in etiolated pea seedlings
✍ J. E. Taylor; D. G. Grosskopf; B. A. McGaw; R. Horgan; I. M. Scott 📂 Article 📅 1988 🏛 Springer-Verlag 🌐 English ⚖ 295 KB

The biosynthetic basis for the high rates of ethylene production by the apical region of etiolated pea (Pisum sativum L.) seedlings was investigated. The ethylene precursor l-aminocyclopropane-l-carboxylic acid (ACC) was quantified in extracts of various regions of seedlings by measuring isotopic di

Unusually large reactivity differences i
Unusually large reactivity differences in the transformation of cyclopropane lactones to 1-aminocyclopropane-1-phosphonic acids and their carboxylic acid analogues
✍ Zsuzsa M. Jászay; György M. Keserű; György Clementis; Imre Petneházy; Katalin Ko 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 194 KB

## Abstract Starting from a cyclopropane lactone **5**, the synthesis of a 1‐aminocyclopropane‐1‐phosphonic acid derivative **11** is described. The considerable differences in the reactivity of the lactone ring opening in the case of a cyclopropane lactone substituted by a phosphonic acid ester **