Results 21 to 30 of about 576,160 (138)

Characterization of gonidial zone of Cycas revoluta coralloid roots by means of microelectrodes [PDF]

FEMS Microbiology Letters, 1993
Microelectrodes were used for measurements of oxygen, ammonium, potassium and calcium concentrations within gonidial zones of Cycas revoluta coralloid roots. Gonidial zone segments contained an oxygen pressure of 85% with respect to its concentration in the atmosphere.
A. Canini, M. Caiola
semanticscholar   +4 more sources

Metabolic Studies on the Coralloid Roots of Encephalartos Transvenosus and its Endophyte

South African Journal of Botany, 1984
In Nostoc-infected coralloid roots of the cycads Encephalartos transvenosus Stapf & Burtt Davy and E. paucidentatus Stapf & Burtt Davy the intercellular cyanobacteria are present in a narrow circular band between the outer and the inner cortex only. When the cyanobacterial density is very great, some intracellular infection is present.
N. Grobbelaar, J. Small, J. Marshall, W. Hattingh   +3 more
semanticscholar   +3 more sources

The cycad coralloid root: is there evidence for plant-microbe coevolution?

Current Opinion in Microbiology
Cycads are survivors, ancient plants originating in the Carboniferous. We hypothesize that cycad resilience and recent diversification could be partially explained by their specialized coral-like (coralloid) roots and their microbiome and that these ...
Kimber L Zonneveld, Edder D. Bustos-Diaz, Barona-Gómez Francisco, Cibrian-Jaramillo Angelica   +3 more
semanticscholar   +2 more sources

The occurrence of coralloid roots on the South African species of the Cycadales and their ability to fix nitrogen symbiotically

South African Journal of Botany, 1986
Thirty-three species of Encephalartos, which include all the known species indigenous to the Republic of South Africa, together with Stangeria eriopus , were found to form coralloid roots.
N. Grobbelaar, W. Hattingh, J. Marshall
semanticscholar   +2 more sources

Rhizopalmoxylon singulare sp. nov. - coralloid palm roots from the Late Cretaceous Deccan Intertrappean beds of Nawargaon, India

Journal of Palaeosciences, 2009
Permineralized coralloid aerial palm roots forming a thick compact mantle have been described from the Deccan Intertrappean beds of Nawargaon, Maharashtra, India. A medium sized root exhibits rhizodermis, thick exodermis, thin outer and wide inner cortex;
S. D. Bonde, S. V. Chate, P. G. Gamre
semanticscholar   +2 more sources

Habitat Disturbance Promotes Shifts in the Abundance of Major Fungal Phyla in the Roots of a Native Orchid, <i>Tipularia discolor</i>. [PDF]

Plant Environ Interact
ABSTRACT Orchids are a widely distributed group of flowering plants with important roles in ecosystems around the globe. However, many species are in decline due, in part, to human‐driven changes in their habitat. It is well established that orchids are reliant on specific groups of mycorrhizal fungi for growth and reproduction and that these fungi can
Watkinson JI.
europepmc   +2 more sources

Chemical ecology of symbioses in cycads, an ancient plant lineage. [PDF]

New Phytol
Summary Cycads are an ancient lineage of gymnosperms that maintain a plethora of symbiotic associations from across the tree of life. They have myriad morphological, structural, physiological, chemical, and behavioral adaptations that position them as a unique system to study the evolution, ecology, and mechanism of symbiosis.
Salzman S, Bustos-Díaz ED, Whitaker MRL, Sierra AM, Cibrián-Jaramillo A, Barona-Gómez F, Villarreal Aguilar JC.   +6 more
europepmc   +2 more sources

Cyanobionts from the coralloid roots of Cycadales: is there any molecular evidence of cyanotoxins?

Limnetica, 2015
Pereira, Ana L., Parente, Tiago, Vasconcelos, Vitor   +2 more
semanticscholar   +2 more sources

Subterranean morphology underpins the degree of mycoheterotrophy, mycorrhizal associations, and plant vigor in a green orchid Oreorchis patens. [PDF]

Plant J
Significance Statement The evolution of full heterotrophy from photosynthetic ancestors is a longstanding question in evolutionary ecology. Our study demonstrates that coralloid rhizomes in a photosynthetic orchid promote greater mycoheterotrophic carbon acquisition, leading to more vigorous flowering scapes and increased flower production.
Suetsugu K, Okada H.
europepmc   +2 more sources

Discovery of Cyanobacteria Associated with Cycads and Description of Three Novel Species in Desmonostoc (Nostocaceae)

Diversity, 2023
Heterocyte-forming cyanobacteria form symbiotic relationships with several lineages of plants. Here, twenty (20) strains of endosymbiotic cyanobacteria (cyanobionts) with Nostoc-like morphologies were isolated from the highly specialized coralloid roots ...
Melissa H. Pecundo, Tao Chen, Thomas Edison E. dela Cruz, M. Patrick Griffith, Zhangli Hu, Huirong Chen, Nan Li   +6 more
doaj   +1 more source