Haustoria of Phanerogamic Parasites

Kuijt, Job

doi:10.1146/annurev.py.15.090177.000515

Cited by 116 publications

(64 citation statements)

References 19 publications

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“…As the collar thickens it constricts the host root (Fig. 3D), as observed for other root hemiparasites of the Santalaceae and Loranthaceae (Kuijt, 1977;Fineran and Hocking, 1983).…”

Section: Haustorial Development and Severing Of Host Rootssupporting

confidence: 67%

“…High resolution examinations of the cell outgrowths proved dicult because of the ease with which their connections with host xylem were fractured during harvesting and subsequent ®xation. Kuijt (1977) and Beyer et al (1989) have cited instances in which interface tissue of haustoria of various root hemiparasites and mistletoes were seen to have invaded host vessel members in a manner akin to that described here for Nuytsia.…”

Section: Haustorial Vasculature and Endophytic Interface With Host Xylemmentioning

confidence: 70%

“…3D). Fineran and Hocking (1983) proposed a possible digestive function of the latter in softening tissues prior to penetration of the root, as also suggested by Kuijt (1977) for certain Santalacean haustoria. Our current observations suggest that the gland might have a primary function in generating a hydrostatic force which drives the sclerenchymatous horn through the stele of the root.…”

Section: Haustorial Development and Severing Of Host Rootsmentioning

confidence: 84%

“…Sectioning of haustoria and attached host roots was undertaken in longitudinal : transverse, longitudinal : longitudinal and transverse : longitudinal planes (Fig. 1, and see Kuijt, 1977).…”

Section: Morphological and Anatomical Studies Of Haustoriamentioning

confidence: 99%

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Haustorial Structure and Functioning of the Root Hemiparastic Tree Nuytsia floribunda(Labill.) R.Br. and Water Relationships with its Hosts

Calladine

Pate

2000

Annals of Botany

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Observations on the origin and mature structure of the haustorium of the Western Australian Christmas tree (Nuytsiā oribunda) corroborate and extend the ®ndings of earlier workers. We show that the previously described sclerenchymatous`horn' or`prong' formed within the haustorium acts as a sickle-like cutting device which transversely severs the host root and then becomes lodged in haustorial collar tissue directly opposite to that where it originated. The cutting process is deduced to be rapid and the gland-like¯uid ®lled structure in the haustorium is suggested to generate a hydrostatic force driving the device through the host root. The haustorial parenchyma cells at the tight junction between the endophytic part of the haustorium and the cut face of the host root develop balloon-like outgrowths which intrude into the lumina of severed xylem vessels of the host. Experiments feeding 0 . 05% (w/v) basic fuchsin to freshly cut ends of host root segments distal to terminally-attached mature haustoria demonstrate an apoplastic pathway from host xylem elements fractured at the interface into haustorial parenchyma, and thence through vascular tissue to the haustorium into the transpiring plant of Nuytsia. Application of labelled water (D 2 O) to uncut basal roots of potted plants of Acacia acuminata parasitized by Nuytsia results in labelling of leafy shoots of parasite and host, indicative of haustorial uptake of water by Nuytsia from host root xylem in the intact association. Measurements of xylem water potentials of pot-cultured seedling Nuytsia associated with a range of hosts, or of mature trees of Nuytsia and partner woody hosts in the native habitat, demonstrate consistently more negative potentials in the parasite than host, suggesting that the parasite may regularly obtain xylem water through its haustorial apparatus.# 2000 Annals of Botany Company

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“…As the collar thickens it constricts the host root (Fig. 3D), as observed for other root hemiparasites of the Santalaceae and Loranthaceae (Kuijt, 1977;Fineran and Hocking, 1983).…”

Section: Haustorial Development and Severing Of Host Rootssupporting

confidence: 67%

Section: Haustorial Vasculature and Endophytic Interface With Host Xylemmentioning

confidence: 70%

Section: Haustorial Development and Severing Of Host Rootsmentioning

confidence: 84%

Section: Morphological and Anatomical Studies Of Haustoriamentioning

confidence: 99%

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Haustorial Structure and Functioning of the Root Hemiparastic Tree Nuytsia floribunda(Labill.) R.Br. and Water Relationships with its Hosts

Calladine

Pate

2000

Annals of Botany

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“…All mistletoes produce a morphologically diverse structure that allows them to interface with their hosts: the haustorium (34,35,36,37,66,67,80,110,116,117,206,225). Calvin and Wilson (37) described four basic haustorial system types that are found in aerial parasitic mistletoes: (i) epicortical roots that grow along a host branch surface and at intervals form haustoria; (ii) clasping unions where the mistletoe haustorium enlarges, partly encircling a branch; (iii) wood roses where host tissue enlarges forming a placenta to which the mistletoe's haustorium attaches; and (iv) bark strands that spread within the host bark and connect to host xylem and phloem (see also 228).…”

Section: Mistletoe Biologymentioning

confidence: 99%

Mistletoes: Pathology, Systematics, Ecology, and Management

et al. 2008

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Parasites on parasites: hyper‐, epi‐, and autoparasitism among flowering plants

Krasylenko

Těšitel

Ceccantini

et al. 2021

American J of Botany

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All living organisms engage in parasitic relations, as either parasites or hosts, and these interactions play an essential role in biological evolution and the functioning of the biosphere (Combes, 2001). Even among photosynthetic organisms, parasitic interactions are often established by both algae and land plants (Oborník, 2019). The most widespread form of parasitism among plants is characterized by the ability to develop a specialized organ called the haustorium (Kuijt, 1969). This organ differentiates the species commonly referred to as parasitic flowering plants from other non-autotrophic plants that require fungal hosts or partners to fulfill their nutritional needs (Feild and Brodribb, 2005; Merckx et al., 2009). Usually developed soon after germination, the haustorium enables attachment AJB REVIEWS

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Haustoria of Phanerogamic Parasites

Cited by 116 publications

References 19 publications

Haustorial Structure and Functioning of the Root Hemiparastic Tree Nuytsia floribunda(Labill.) R.Br. and Water Relationships with its Hosts

Haustorial Structure and Functioning of the Root Hemiparastic Tree Nuytsia floribunda(Labill.) R.Br. and Water Relationships with its Hosts

Mistletoes: Pathology, Systematics, Ecology, and Management

Parasites on parasites: hyper‐, epi‐, and autoparasitism among flowering plants

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