Germination response of Salsola schweinfurthii (Chenopodiaceae) to salinity and winged perianth removal

Bhatt, Arvind; Pérez-García, Francisco J.; Carón, María Mercedes; Gallacher, David

doi:10.15258/sst.2016.44.2.14

Cited by 16 publications

(10 citation statements)

References 33 publications

(36 reference statements)

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“…For seeds without wings, both germination percentage and GRI decreased with increasing salinity. Similar results have been reported previously for the same species () and for other halophytes (, , and , and , , , ). Wing removal might assist germination by reducing seed contact with salinity ( and ).…”

Section: Discussionsupporting

confidence: 91%

Perianth colour dimorphism is related to germination properties and salinity tolerance in Salsola vermiculata in the Arabian deserts

Bhatt

Phartyal

Phondani

et al. 2017

Nordic Journal of Botany

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We investigated the dimorphic perianth colour of Salsola vermiculata and its association with seed germination percentage, interactions with temperature, light, salinity and recovery from prior salinity exposure. Seeds with and without pink and yellow perianth were incubated at three thermal regimes, two photoperiods, and five salinity levels. Germination recovery after salinity exposure was observed on seeds that failed to germinate during the salinity study. The germination percentage and rate were signiﬁcantly related to the perianth colour, the presence of perianth wings, thermal regimes and photoperiod. The presence of a perianth wing significantly reduced germination percentage and germination rate in both the pink and the yellow morph, but the yellow morph exhibited a higher germination percentage. Perianth wing removal increased germination in saline conditions. With the perianth removed, germination recovery was higher for the pink morph than for the yellow one. We suggest that by providing two different strategies for balancing germination with dormancy during favourable conditions, the presence of two morphs makes S. vermiculata more successful in highly unpredictable desert environments.

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Section: Discussionsupporting

confidence: 91%

Perianth colour dimorphism is related to germination properties and salinity tolerance in Salsola vermiculata in the Arabian deserts

Bhatt

Phartyal

Phondani

et al. 2017

Nordic Journal of Botany

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“…Seed germination is one of the most important phases in the life cycle of halophytes and germination responses to different environmental factors play an important role in determining their distribution in saline environments (Song et al, 2005;Li et al, 2010). In particular, under natural conditions, germination of halophytic species is controlled by environmental factors such as light (Huang et al, 2003, Bhatt et al, 2016a, temperature (El-Keblawy et al, 2013;Bhatt et al, 2016b) and soil salinity (Khan et al, 2002;El-Keblawy and Bhatt, 2015;Bhatt and Santo, 2016). The requirement to adapt to each of these environmental factors varies among species, and therefore each halophyte responds differently during its seed germination phase (Khan and Ungar, 1997;Noe and Zedler, 2000).…”

Section: Introductionmentioning

confidence: 99%

Eco-physiological studies on desert plants: germination of Halothamnus iraqensis Botsch. seeds under different conditions

et al. 2019

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With the aim to investigate if the halophyte Halothamnus iraqensis Botsch. can be suitable for re-vegetation and remediation of salt-affected lands, this study evaluated (1) the effects of photoperiod, thermoperiod, storage period and wings' presence on its seed germination, and (2) the ability of its seeds to have successful germination recovery after salt stress. Germination tests in different photoperiods (12 h light/12 h darkness and total darkness) and thermoperiods (15°C/20°C and 20°C/25°C) were conducted for seeds collected in 2012, 2013, 2014, 2015 and 2016. The seeds collected in 2016 were sown under different salinity levels (0, 100, 200, 400 and 600 mM NaCl) to assess the salinity tolerance during the germination. Wings' presence highly inhibited seed germination of this species in both photoperiods and thermoperiods under all salinity level treatments. In addition, the germination recovery occurred well when seeds were deprived of their wings. The photoperiod of 12 h light/12 h darkness and the thermoperiod of 15°C/20°C were the best conditions for seed germination. Germination percentages of H. iraqensis seeds decreased with the increasing storage duration, especially after three years of the collection. In addition, H. iraqensis seeds were able to germinate under different salinity levels, and their germination percentages decreased with increasing salinity levels. H. iraqensis seeds have the ability to recover their germination after alleviating the salt stress, irrespective of photoperiod, highlighting the halophilous character of this species.

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“…(Al-Rowaily 2001), Salsola rubescens Franch. (El-Keblawy et al 2013), Salsola schweinfurthii Solms (Bhatt et al 2016c) and the same H. salicornicum (Bhatt et al 2016a), where the removal of the seed wings increased the germination percentages. Previous studies reported that the presence of wings may inhibit the seed germination process by acting as a mechanical barrier for radicle emergence or by the presence of inhibiting substances in the wings (Wei et al 2007, Xing et al 2013, El-Keblawy et al 2013.…”

Section: Discussionmentioning

confidence: 97%

Does perianth colour affect the seed germination of two desert shrubs under different storage periods and conditions?

Bhatt

Santo

2018

Nordic Journal of Botany

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Haloxylon salicornicum and Salsola vermiculata (Amaranthaceae) are two perennial shrubs producing fruits with differently coloured perianths (yellow vs pink) on separate individuals. To test the impact of different storage periods (four, eight and twelve months) and temperature conditions (freezing, room temperature and natural field temperatures) on the seed germination of the two seed categories, germination tests were carried out on both species. For both species, collected from wild plants in the Arabian desert (Qatar), seed germination was tested under two photoperiods (light 12/12; dark 24 hours) at 20/30°C for winged (intact) and de‐winged seeds. For each species, all the considered factors (perianth colour, wing presence, photoperiod, storage period and storage conditions) had significant effects on seed germination (p < 0.001), while the interactions among factors varied in their level of significance depending on the species. In both species, yellow seeds germinated considerably better than the pink ones, the presence of wings slowed the germination, and both storage period and temperature conditions highly influenced their germination ability. Our results indicate that seeds from different perianth colours have different germination strategies to delay their germination and distribute the species through time by escaping germination time by imposing some kind of after‐ripening or seed dormancy. The variation in storage time and storage conditions might help in extending their germination period, where one set of seeds germinate immediately, and the other set of seeds becomes dormant and thus contributes to the formation of a soil seed bank for the long‐term recruitment of seedlings. This study highlights an ecological advantageous strategy for these two species growing in the unpredictable desert habitat.

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Germination response of Salsola schweinfurthii (Chenopodiaceae) to salinity and winged perianth removal

Cited by 16 publications

References 33 publications

Perianth colour dimorphism is related to germination properties and salinity tolerance in Salsola vermiculata in the Arabian deserts

Perianth colour dimorphism is related to germination properties and salinity tolerance in Salsola vermiculata in the Arabian deserts

Eco-physiological studies on desert plants: germination of Halothamnus iraqensis Botsch. seeds under different conditions

Does perianth colour affect the seed germination of two desert shrubs under different storage periods and conditions?

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