Perianth and abiotic factors regulate seed germination of <i>Haloxylon stocksii—</i>A cash crop candidate for degraded saline lands

Rasheed, Aysha; Hameed, Abdul; Gul, Bilquees; Khan, M. Ajmal

doi:10.1002/ldr.3334

Cited by 19 publications

(16 citation statements)

References 56 publications

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“…High soil salinity can inhibit seed germination via osmotic effect and toxic effect ( Gul et al, 2013 ; Song et al, 2017 ). Although the toxic effects on the hydrated seeds of halophytes have been reported, the decline in germination caused by salinity is primarily osmotic effect ( Rasheed et al, 2019 ). For example, the brown seeds of S. aralocaspica can germinate to 10% at 1400 mM NaCl.…”

Section: Introductionmentioning

confidence: 99%

Differential Responses of Dimorphic Seeds and Seedlings to Abiotic Stresses in the Halophyte Suaeda salsa

Zhang

et al. 2021

Front. Plant Sci.

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The period between seed germination and seedling establishment is one of the most vulnerable stages in the life cycle of annuals in the saline environments. Although germination characteristics of Suaeda salsa seeds have been reported, the comparative germination patterns of dimorphic seeds and seedling growth to different abiotic stresses remain poorly understood. In this study, germination responses of dimorphic seeds to light and temperature were compared. Meanwhile, responses of dimorphic seeds and thereafter seedlings of S. salsa to different concentrations of NaCl and Na2SO4 were also tested. The results showed that the light did not significantly affect germination percentage of brown seeds, but significantly promoted germination of black seeds. Brown seeds could reach high germination percentage over a wide temperature range, however, germination of black seeds gradually increased with the increase of temperature. Brown seeds had higher germination percentage and velocity than black seeds under the same salt conditions. However, black seeds had higher recovery germination than brown seeds when transferred to deionized water. Young seedlings had lower salt tolerance than germinating seeds. At the same concentrations, Na2SO4 had stronger inhibitory effect on seed germination and seedling growth than NaCl. This study comprehensively compared germination traits of dimorphic seeds and seedling growth of S. salsa, and then developed a conceptual model to explain their adaptation to harsh saline environment.

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Section: Introductionmentioning

confidence: 99%

Differential Responses of Dimorphic Seeds and Seedlings to Abiotic Stresses in the Halophyte Suaeda salsa

Zhang

et al. 2021

Front. Plant Sci.

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“…Plants living in arid regions are expected to experience high levels of drought stress (Cui et al, 2019;Rasheed et al, 2019). Our results indicate that seeds of A. venetum and A. pictum have high drought tolerance and show differential characteristics.…”

Section: Discussionmentioning

confidence: 78%

“…Seed germination is the most critical transition period for crop establishment, especially under adverse abiotic conditions (Campobenedetto et al, 2020). Successful establishment of seedlings largely depends on timely germination and uniform emergence under different abiotic stresses such as drought and salinity (Rasheed et al, 2019). Although studies focusing on germination have been undertaken for A. venetum and A. pictum seeds, the majority of investigations have used freshly matured seeds and under a single environmental factor (Shi et al, 2014;Liu et al, 2015;Xu et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…It is relatively easy to regulate light and temperature condition via adjustment of planting depth and selection of suitable sowing date in agriculture management. For seed germination of industrial crops in arid and semi-arid regions, drought and salinity stresses are the main limitation factors (Rasheed et al, 2019). Drought and salinity can delay or completely inhibit germination (Zhu et al, 2006;Toscano et al, 2017;Hu et al, 2018;Tang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Storage Period and Different Abiotic Factors Regulate Seed Germination of Two Apocynum Species — Cash Crops in Arid Saline Regions in the Northwestern China

et al. 2021

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On degraded land in arid regions, cultivation of Apocynum species can provide significant environmental benefits by preventing soil erosion and desertification. Furthermore, Apocynum venetum and Apocynum pictum, which are mainly distributed in salt-barren lands in the northwestern region of China, are traditionally used to produce natural fiber and herbal tea. Direct sowing of both species may encounter various abiotic stresses such as drought and salinity. However, these effects on germination remain largely unknown, especially for seeds with different storage periods. The aim of this study was to evaluate the effects of storage period, light condition, temperature regime, drought, and salinity on germination performances of both species. Germination experiment was carried out in November 2017. There were four replicates for each treatment, and each petri dish contained 25 seeds. The results indicated that prolongation of storage period significantly decreased the germination percentage and velocity, especially under abiotic stresses. Light did not affect seed germination of A. venetum and A. pictum under any conditions. Seeds had better germination performance at 10/25 and 15/30°C than those of seeds incubated at any other temperatures. With the increase of polyethylene glycol (PEG) and salinity concentrations, seed germination for both species gradually decreased, especially for seeds stored for 2 years. Low PEG (0–20%) and salinity concentration (0–200 mM) did not significantly affect germination percentage of freshly matured seeds. However, long-time storage significantly decreased drought and salinity tolerance in A. venetum and A. pictum during germination stage. For saline soils in arid and semi-arid regions, freshly matured seeds or 1-year-stored seeds of both Apocynum species are recommended to be sown by using drip-irrigation in spring.

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“…Sosa et al (2005) suggested that salt ion effects would have less influence on seed germination in Prosopis strombulifera than the soil water content. Comparable constatations were also drawn on the seed germination of Chenopodium glaucum (Duan et al, 2004), Suaeda vermiculata (El-Keblawy et al, 2018), Haloxylon stocksii (Rasheed et al, 2019) and Prosopis pallida (Aljasm et al, 2021). Zehra et al (2013) reported the germination inhibition in Phragmites karka by using different salts of sodium, magnesium and potassium.…”

Section: Salt and Drought Effect On Germination And Initial Growth Of...mentioning

confidence: 97%

Salt and Drought Effect on Germination and Initial Growth of Lavandula stoechas: A Potential Candidate for Rehabilitation of the Mediterranean Disturbed Coastal Lands

Dadach

Benajaoud

Mehdadi

2021

Ekológia (Bratislava)

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Information relating to germination and seedling emergence of a plant aids in determining the species spatiotemporal distribution and also facilitates in designing appropriate plant management strategies within an ecosystem. Lavandula stoechas L. (Lamiaceae), a naturally occurring shrub, is particularly used in pharmaceutical and cosmetic industries. This species, indeed, has the potential for rehabilitation of degraded costal lands. However, various aspects of its seed biology have not yet been recognised. Here, we aimed to assess the effects of different soluble salts (NaCl, CaCl2, MgCl2 and Na2SO4) and drought (as simulated by polyethylene glycol, [PEG]6000) on seed germination patterns and early seedling growth responses. Seeds treated with five iso-concentration (0–100 mM) salinities and five PEG6000 (0 to −1 MPa) levels were incubated in a controlled germinator set at 20°C. The preliminary results revealed that seeds of L. stoechas lacked primary/innate dormancy and they germinated abundantly (89.2% germination) and fast (7.4% day−1) in the absence of stress. Regardless of the kind of salt applied, the germination percentage (GP) and germination rate index (GRI) fell significantly with increasing salinity, and germination ceased completely at 100 mM Na2SO4. In fact, the salinity tolerance index (STI) showed that, among all salts tested, Na2SO4 appeared to have more inhibitory action on germination. In addition, L. stoechas was found to be tolerant to moderate salty stress (<50 mM) in early growth phase. The salt solution parameters (i.e. concentration, electrical conductivity [EC] and salt content) were best correlated with seed/seedling metrics. pH was not a good predictor for salt effects at the germination/seedling stages. Overall, this species seems to be sensitive to drought at the germination and initial growth phases. The germination recovery potential of L. stoechas in both stresses stipulates that this species can be regarded as a promising candidate in the rehabilitation of Mediterranean disturbed coastal habitats.

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Perianth and abiotic factors regulate seed germination of Haloxylon stocksii—A cash crop candidate for degraded saline lands

Cited by 19 publications

References 56 publications

Differential Responses of Dimorphic Seeds and Seedlings to Abiotic Stresses in the Halophyte Suaeda salsa

Differential Responses of Dimorphic Seeds and Seedlings to Abiotic Stresses in the Halophyte Suaeda salsa

Storage Period and Different Abiotic Factors Regulate Seed Germination of Two Apocynum Species — Cash Crops in Arid Saline Regions in the Northwestern China

Salt and Drought Effect on Germination and Initial Growth of Lavandula stoechas: A Potential Candidate for Rehabilitation of the Mediterranean Disturbed Coastal Lands

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