Effects of seed maturation time and dry storage on light and temperature requirements during germination in invasive Prosopis juliflora

El‐Keblawy, Ali; Al-Rawai, Awatif

doi:10.1016/j.flora.2005.04.009

Cited by 74 publications

(38 citation statements)

References 46 publications

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“…Therefore, plants may benefit ecologically from seed dormancy, especially plants inhabiting temperate (Fenner, 1985;Baskin and Baskin, 1998;Gutterman, 2002) or also hot (El-Keblawy and Al-Rawai, 2006) deserts.…”

Section: Effects Of Cold Stratification On Caryopsis Dormancy and Germentioning

confidence: 99%

Caryopsis germination and seedling emergence in an inland dune dominant grass Leymus secalinus

Zhu

Dong

Huang

2007

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Effects Of Cold Stratification On Caryopsis Dormancy and Germentioning

confidence: 99%

Caryopsis germination and seedling emergence in an inland dune dominant grass Leymus secalinus

Zhu

Dong

Huang

2007

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…Different populations of the same species vary in germination behavior (i.e. germination percentages and germination timing), responses to environmental conditions and the degree of dormancy (Qaderi et al ; El‐Keblawy & Al‐Rawai ; Pérez‐García ). Thus, populations of the same species occurring in different habitats could adopt different strategies during germination to cope with the special environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Effects of maternal salinity on salt tolerance during germination of Suaeda aegyptiaca, a facultative halophyte in the Arab Gulf desert

El‐Keblawy

Gairola

Bhatt

et al. 2016

Plant Species Biology

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Suaeda aegyptiaca is a facultative halophyte found in saline and non-saline habitats of the Arab Gulf desert, which produces small-sized undispersible seeds. The interactive effects of maternal salinity and other environmental conditions, such as salinity, light and temperatures, that are prevailing during seed germination have received little attention for a facultative halophyte. This study tested the effects of maternal salinity on salt tolerance during seed germination of S. aegyptiaca under different light and temperature regimes. Seeds collected from both saline and non-saline habitats of the United Arab Emirates (UAE) were germinated in 0, 50, 100, 200 and 400 mM NaCl, and incubated at 15/25 C, 20/30 C and 25/35 C in both 12-h light/12-h dark regimes and continuous darkness. Generally, seeds of the non-saline habitat were 56% heavier and attained greater germination at the lower temperatures than seeds of the saline habitat. Seeds of the saline habitat germinated better in saline solutions at higher temperatures and in light. Germination was faster for seeds of the saline habitat than for seeds of non-saline habitats. Germination recovery after transfer to distilled water was significantly greater for seeds from the non-saline habitat, compared with seeds from saline habitats. Recovery was greater at lower and/or moderate temperatures, compared with at higher temperatures. Germination was significantly faster during recovery, compared with in the saline solutions. The study indicates that the maternal effect of salinity was confounded with the seed-size effect and it cannot be conclusively confirmed.

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“…This phenomenon was observed in some Geraniaceae, Fabaceae and Rhamnaceae. For instance, the dry storage increased the germination percentage in Portulaca oleracea (El-Keblawy & Al-Ansari 2000), Bromus tectorum (Allen & Meyer 2002), Onopordum acanthium (Qaderi et al 2003) and Prosopis juliflora (El-Keblawy & Al-Rawai 2006). The ecologic significance of dormancy loss induced by dry storage is associated with the temperature fluctuations that occur in natural habitats.…”

Section: Discussionmentioning

confidence: 99%

Factors controlling germination and dormancy processes in dimorphic fruits of Atriplex inflata (Chenopodiaceae)

Atia¹,

Rabhi²,

Debez³

et al. 2011

Plecevo

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Background and aims -Seed dimorphism is an adaptive feature to harsh environments such as arid and saline habitats. This is explained as an escape from inadequate conditions. In the current study, we investigated the seed germination of a dimorphic species Atriplex inflata Muell. (Chenopodiaceae). A. inflata occurs in saline habitats, namely in arid regions. Its bracteoles enclose a brown or a black fruit. This unit constitutes the diaspore. Methods -Mature fruits were collected from Kelbia (35°46'06"N 10°07'34"E), located in the centre of Tunisia, with semi-arid climate. The effect of cold stratification, nitrate (KNO 3 , 10 mM), light, dry storage (for seven months), chemical scarification and salt pretreatment on germination were determined in order to assess the factors that control germination and dormancy. Key results -The results show that brown fruits germinated rapidly and the final germination percentage was 98% after twenty days. However, germination of black fruits was slower and reached only 19%. This confirms the fact that the difference in morphology is accompanied by a difference in germination capacity and dormancy in A. inflata. Chemical scarification and dry storage increased germination capacity of black fruits. Thus, the black fruit showed a physical dormancy and a non-deep physiological dormancy. Conclusion -The production of two types of fruit in A. inflata, one dormant and the other non-dormant, is of high ecological importance for the survival of populations. Actually, this ensures both rapid germination (brown fruits) and a permanent seed bank (black fruits), which permit the persistence of the species and population establishment in disturbed environments.

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Effects of seed maturation time and dry storage on light and temperature requirements during germination in invasive Prosopis juliflora

Cited by 74 publications

References 46 publications

Caryopsis germination and seedling emergence in an inland dune dominant grass Leymus secalinus

Caryopsis germination and seedling emergence in an inland dune dominant grass Leymus secalinus

Effects of maternal salinity on salt tolerance during germination of Suaeda aegyptiaca, a facultative halophyte in the Arab Gulf desert

Factors controlling germination and dormancy processes in dimorphic fruits of Atriplex inflata (Chenopodiaceae)

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