Difference in the root structure of hyperaccumulator Thlaspi caerulescens and non-hyperaccumulator Thlaspi arvense

Root system morphology and primary root anatomy in natural non-metallicolous and metallicolous populations of three Arabidopsis species differing in heavy metal tolerance

“…The middle cortex cells were different from additional peri-endodermal layer observed in heavy metaltolerant species Thlaspi caerulescens (Zelko et al 2008) or, from the hypodermal periderm occurring close to the root apex after Cd treatment in Merwilla plumbea (Lux et al 2011b). These types of cells are characteristic with thickened cell walls, occasionally impregnated by lignin and suberin, and were suggested to have protection roles either in restricting heavy metal ions uptake or their sequestration as reviewed by Broadly et al (2007) and Lux et al (2011a).…”

“…Studies of the relationships between heavy metaltolerance or metal-toxicity and root anatomy have shown particularly development of specific tissues and cellular structures serving as barriers for water and ion transport in Silene dioica (Martinka & Lux 2004), Thlaspi caerulescens (Zelko et al 2008) or Merwilla plumbea (Lux et al 2011b). Structural responses in the roots were reviewed for Zn and Cd (Broadley et al 2007;Lux et al 2011a).…”

First evidence on different transportation modes of arsenic and phosphorus in arsenic hyperaccumulator Pteris vittata

“…The endodermis acts as an apoplastic barrier to the passage of ions, enabling plants to selectively take up ions (Peterson and Enstone, 1996). And the endodermis structure has been reported to vary between Zn/Cd hyperaccumulators and non-hyperaccumulators (Zelko et al, 2008). P. vittata endodermis might also be different from that of an As non-hyperaccumulator, such that P. vittata allows a considerable amount of As to enter the xylem while normal plants do not.…”

Role of Phi Cells Under Abiotic Stress in Plants

“…Thlaspi caerulescens is a zinc hyperaccumulator, but Thlaspi arvense is a non-hyperaccumulator. Thlaspi caerulescens is characterised by the presence of a 'peri-endodermal' cell layer presenting thickened inner tangential walls but not in T. arvense (Broadley et al 2007;Zelko et al 2008). These thickenings develop close to the root tip, about 400-600 μm from the root cap boundary.…”

“…(Melville et al 1987) Fabaceae Ceratonia siliqua L. (Pratikakis et al 1998;Rhizopoulou 2004) Arachis hypogaea (Tajima et al 2008) Caesalpinia peltophoroides (Henrique et al 2010) Hedysarum pedicellare (Van Tieghem 1888) Geraniaceae Pelargonium hortorum Bailey (Haas et al 1976;Peterson et al 1981) Geranium sp. (Van Tieghem 1888) Brassicaceae Thlaspi caerulescens (Broadley et al 2007;Zelko et al 2008) Brassica oleracea (Fernandez-Garcia et al 2009) B. napus (Enstone et al 2003 …”