Cycad Coralloid Roots Contain Bacterial Communities Including Cyanobacteria and Caulobacter spp. That Encode Niche-Specific Biosynthetic Gene Clusters [PDF]
Genome Biology and Evolution, 2017 Abstract Cycads are the only early seed plants that have evolved a specialized root to host endophytic bacteria that fix nitrogen. To provide evolutionary and functional insights into this million-year old symbiosis, we investigate endophytic bacterial sub-communities isolated from coralloid roots of species from
Karina Gutiérrez-García +8 more
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Three coralloid species of the genus Trechispora (Trechisporales, Basidiomycota) in China: two newly discovered taxa and one reported for the first time [PDF]
MycoKeys, 2023 Two new species of Trechispora indigenous to southern China, T. laxa and T. tongdaoensis, are described and illustrated, and the first record of T. khokpasiensis in China is reported.
Zhang,Ping +20 more
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Characterization of gonidial zone ofCycas revolutacoralloid 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.
CANINI, ANTONELLA, Grilli Caiola, M.
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Ectomycorrhizal Symbiosis as a Bio-Enhancement Strategy for Transplantation of Somatic Embryo-Derived Pinus elliottii [PDF]
PlantsSomatic embryo-derived plantlets of pines often fail to survive acclimatization, which limits commercial micropropagation. Conventional hardening methods do not correct the physiological weaknesses of in vitro plantlets, especially the lack of beneficial
Zhen-Xing Tian +4 more
doaj +2 more sources
Conserved symbiosis‐associated genes in the cycad Encephalartos natalensis suggest co‐option for cyanobacterial symbiosis [PDF]
New Phytologist, Volume 251, Issue 4, Page 2168-2185, August 2026.The heterocyst‐rich Encephalartos natalensis cyanobacterial zone in coralloid root suggests co‐option of conserved symbiosis‐associated genes. This figure was created in BioRender (BioRender.com/https://BioRender.com/n3qveqc). Summary Plant‐cyanobacterial symbioses have evolved independently at least four times across land plants, yet their underlying ...
Cassandra Schoeman +6 more
wiley +2 more sources
Structure and biosynthesis of desmamides A-C, lipoglycopeptides from the endophytic cyanobacterium Desmonostoc muscorum LEGE 12446 [PDF]
J Nat Prod, 2022 Certain cyanobacteria of the secondary metabolite-rich order Nostocales can establish permanent symbioses with a large number of cycads, by accumulating in their coralloid roots and shifting their metabolism to dinitrogen fixa-tion.
Vitor, Vasconcelos +5 more
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Chemical ecology of symbioses in cycads, an ancient plant lineage [PDF]
New Phytologist, Volume 246, Issue 4, Page 1494-1504, May 2025.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.
Shayla Salzman +6 more
wiley +2 more sources
Complete Genome of an Alkali‐Resistant Rhizobium anhuiense Symbiont of Pea Reveals Species‐Specific Plasmid Fusion and Genomic Plasticity [PDF]
Environmental Microbiology Reports, Volume 18, Issue 3, June 2026.Rhizobium anhuiense strain Xianghu001 is an alkali‐tolerant, nitrogen‐fixing symbiont isolated from pea (Pisum sativum) root nodules. Genome sequencing revealed a lineage‐specific megaplasmid fusion and high plasmid plasticity. Functional assays confirmed its plant growth‐promoting traits, including increased total nitrogen content and IAA production ...
Jiashun Miao +7 more
wiley +2 more sources
A new coralloid arecoid palm root mat from the Deccan Intertrappean Beds of India and its significance [PDF]
Turkish Journal of BotanyA new fossil-species of coralloid palm root mat under the organ genus Rhizopalmoxylon is reported from the latest Maastrichtian (Late Cretaceous) to earliest Danian (Early Palaeocene) sediments (c. 66–65Ma) of the Deccan Intertrappean Beds of Madhya Pradesh, Central India.
SANCHITA KUMAR +2 more
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Root Growth and Branching of Two Cycas Species Are Influenced by Form of Nitrogen Fertilizer
AgronomyHorticultural research into the group of plants known as cycads has been deficient, and this includes the study of root growth and function. The form of nitrogen (N) available to plants is known to influence root growth and morphology.
Thomas E. Marler
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