Acquisition of physical dormancy and ontogeny of the micropyle–water-gap complex in developing seeds of Geranium carolinianum (Geraniaceae)

Gama-Arachchige, N. S.; Baskin, Jerry M.; Geneve, Robert L.; Baskin, Carol C.

doi:10.1093/aob/mcr103

Cited by 38 publications

(27 citation statements)

References 39 publications

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“…15 % in Peltophorum pterocarpum (Mai-Hong et al 2003), 12 % in Gleditsia triacanthos (Geneve 2009), G. aquatica (Geneve 2009), Gymnocladus dioicus (Geneve 2009), Lupinus arboreus (Hyde 1954), Trifolium ambiguum (Hay et al 2010), T. pretense (Hyde 1954) and T. repens (Hyde 1954), 11 % in L. digitatus (Gladstones 1958) and Geranium carolinianum (Gama-Arachchige et al 2011). However, the reason why some seeds develop impermeable coats, while others maturing on the same plant produce permeable seed coats remains unclear.…”

Section: Discussionmentioning

confidence: 99%

“…Numerous studies on seed development have shown that the transition from a permeable to impermeable seed coat coincides with the decline in moisture content during the maturation drying phase of seed development (Jaganathan 2016). Indeed, it has been observed in a few species that the seed coat becomes impermeable only when the moisture content of the seeds falls to a specifi c threshold level (Hyde 1954;Gladstones 1958;Egley 1979;Chinnasamy & Bal 2003;Hay et al 2010;Gama-Arachchige et al 2011;Gresta et al 2011). Th us, the number of seeds with impermeable seed coats produced by plants may vary between sites or within years based on the moisture content reached during maturation drying, which is aff ected by the environmental conditions including temperature and relative humidity.…”

Section: Introductionmentioning

confidence: 99%

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Relationship between seed moisture content and acquisition of impermeability in Nelumbo nucifera (Nelumbonaceae)

et al. 2017

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Seeds of Nelumbo nucifera do not imbibe water, and thus have physical dormancy (PY). However, a proportion of seeds are permeable to water, and so we hypothesized that variation in moisture content is a reason for the development of both permeable and impermeable seeds. Th e permeable proportion of seeds present in a lot collected from Suzhou, China, was separated using an imbibition test. Th e permeable proportion had an average moisture content of 15.6 %, compared with 8.5 % for impermeable seeds. Drying permeable seeds above silica gel to 10 % and 8 % f. wb., resulted in 77 and 100 % impermeable seeds, respectively, compared with no impermeable seeds at 15 % moisture content. Dried to 10 % moisture content, and incubated above water in an airtight container, 46 % of the seeds reverse impermeability. Permeable seeds with 15 % moisture content maintained above LiCl 2 (RH=70 %) did not develop impermeability after three months of storage. Th e seeds dried to 6 % moisture content and stored above water in an airtight container showed no increase in moisture. Based on these results, we conclude that there is a strong relationship between moisture content and the onset of impermeability in this species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Relationship between seed moisture content and acquisition of impermeability in Nelumbo nucifera (Nelumbonaceae)

et al. 2017

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“…As well as being a protective barrier between the embryo and the environment, the structural and molecular variations found among different coats deeply influence the Journal of Seed Science, v.40, n.3, p.331-341, 2018 physiology of the seed. Particularly, the variations found in the coat thickness affect germination and dormancy (Coen and Magnani, 2018).…”

Section: Introductionmentioning

confidence: 99%

Physical, physiological and anatomical changes in Erythrina speciosa Andrews seeds from different seasons related to the dormancy degree

et al. 2018

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Dormancy, a process that allows seeds to survive in adverse environments, needs to be broken for germination to start, for example, by the disruption of the impermeable layer of seeds. Mature seeds of Erythrina speciosa present seed coat impermeability, whose degree depends on the year of production. The objective of this study was to analyze the physical, physiological, anatomical, and ultrastructural seed coat modifications, according to the environmental conditions in which seeds were produced, as well as the seed sensitivity to treatments as for breaking dormancy. E. speciosa seeds were collected for six years in a row and were analyzed as for dormancy degree. Moreover, chemical scarifications by different immersion times were applied on seeds from two production years, as well as mechanical scarification, which was an efficient methodology to overcome dormancy. Different immersion times by acid scarification were necessary to break dormancy in each harvest year. It was possible to conclude that the climatic conditions under which the mother plant is submitted can influence the dormancy degree of E. speciosa seeds, but the expected anatomical changes between dormant and non-dormant seeds were not found in seeds from this species.

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“…The seed coat of Rosa rugosa is lignified and hard, which im-pedes the germination of seeds to some extent [13]. The seed coat can be partially corroded with concentrated hydrochloric acid and sulfuric acid so that the seed husk is thinned, the blockage is removed and the seed coat permeability is increased [14] [15] [16]. Our experiment indicated that concentrated acid treatments not only promoted germination of Rosa rugosa seeds, but also disinfected the surface, which is favorable for aseptic germination.…”

Section: Effect Of Seed Coat On Seed Germinationmentioning

confidence: 99%

A Study on the Aseptic Germination Method for <i>Rosa rugose</i> Seeds

Fu¹,

Xing²,

Dang³

et al. 2017

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In order to find a method to break dormancy of Rosa rugosa seeds and interspecific hybrid seeds between Rosa rugosa and Rosa hybrid quickly, and accelerate the breeding process of interspecific hybridization between Rosa rugosa and Rosa hybrid, the influence of concentrated acid, seed maturity, GA 3 (gibberellin) and low temperature (4˚C) on seed germination of Rosa rugosa from Muping was researched under aseptic condition. The results showed that aseptic germination can significantly shorten the germination time of Rosa rugosa seeds and raise its germination ratio. Before inoculation, concentrated acid treatment greatly increased the germination rate and reduced the contamination rate of the seeds. The higher the degree of maturity of seeds is, the lower the germination rate would be, and the best time for seed to aseptic germination is 60 d after pollination. The addition of GA 3 in 1/2MS medium could promote seeds germination better, and when the concentration of GA 3 was 0.15 mg/L, the seed germination ratio was the highest; the germination time decreased and the seed germination ratio increased gradually as the treatment time at 4˚C lasted longer.

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Acquisition of physical dormancy and ontogeny of the micropyle–water-gap complex in developing seeds of Geranium carolinianum (Geraniaceae)

Abstract: Acquisition of PY in seeds of G. carolinianum occurs after physiological maturity and is triggered by maturation drying. The micropyle and water gap cannot be considered as two separate entities, and thus it is more appropriate to consider them together as a 'micropyle--water-gap complex'.

Cited by 38 publications

References 39 publications

Relationship between seed moisture content and acquisition of impermeability in Nelumbo nucifera (Nelumbonaceae)

Relationship between seed moisture content and acquisition of impermeability in Nelumbo nucifera (Nelumbonaceae)

Physical, physiological and anatomical changes in Erythrina speciosa Andrews seeds from different seasons related to the dormancy degree

A Study on the Aseptic Germination Method for <i>Rosa rugose</i> Seeds

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Acquisition of physical dormancy and ontogeny of the micropyle–water-gap complex in developing seeds of Geranium carolinianum (Geraniaceae)

Cited by 38 publications

References 39 publications

Relationship between seed moisture content and acquisition of impermeability in Nelumbo nucifera (Nelumbonaceae)

Relationship between seed moisture content and acquisition of impermeability in Nelumbo nucifera (Nelumbonaceae)

Physical, physiological and anatomical changes in Erythrina speciosa Andrews seeds from different seasons related to the dormancy degree

A Study on the Aseptic Germination Method for &lt;i&gt;Rosa rugose&lt;/i&gt; Seeds

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Product

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A Study on the Aseptic Germination Method for <i>Rosa rugose</i> Seeds