ArticleAnnals of botany2012
Seed ultrastructure and water absorption pathway of the root-parasitic plant Phelipanche aegyptiaca (Orobanchaceae).
Article in Annals of botany, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed.
- Reduced strigolactone exudation as a key resistance mechanism in wild carrots against Phelipanche aegyptiaca.Plant & cell physiology · 2026Article
- Effects of HFrontiers in plant science · 2023Article
- Involvement of α-galactosidase OmAGAL2 in planteose hydrolysis during seed germination of Orobanche minor.Journal of experimental botany · 2022Article
- How do holoparasitic plants exploit vitamin K1?Plant signaling & behavior · 2021Article
- Three-dimensional reconstructions of haustoria in two parasitic plant species in the Orobanchaceae.Plant physiology · 2021Article
- The mechanism of host-induced germination in root parasitic plants.Plant physiology · 2021Review
- Plasma membrane phylloquinone biosynthesis in nonphotosynthetic parasitic plants.Plant physiology · 2021Article
- Transcriptome analysis of Phelipanche aegyptiaca seed germination mechanisms stimulated by fluridone, TIS108, and GR24.PloS one · 2017Article
- Water uptake mechanism and germination of Erythrina velutina seeds treated with atmospheric plasma.Scientific reports · 2016Article
- Broomrape Weeds. Underground Mechanisms of Parasitism and Associated Strategies for their Control: A Review.Frontiers in plant science · 2016Review
- Seed response to strigolactone is controlled by abscisic acid-independent DNA methylation in the obligate root parasitic plant, Phelipanche ramosa L. Pomel.Journal of experimental botany · 2015Article
- Difference in glycerol levels between leukemia and normal bone marrow stem cells.Oncology letters · 2014Article
- 3D Plant cell architecture of Arabidopsis thaliana (Brassicaceae) using focused ion beam-scanning electron microscopy.Applications in plant sciences · 2014Article
- PrCYP707A1, an ABA catabolic gene, is a key component of Phelipanche ramosa seed germination in response to the strigolactone analogue GR24.Journal of experimental botany · 2012Article
- Maternal tissue is involved in stimulant reception by seeds of the parasitic plant Orobanche.Annals of botany · 2012Article
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsObligate root parasitic plants of the Orobanchaceae do not germinate unless they chemically detect a host plant nearby. Members of this family, like Orobanche, Phelipanche and Striga, are noxious weeds that cause heavy damage to agriculture. In spite of their economic impact, only a few light microscopical studies of their minute seeds have been published, and there is no knowledge of their ultrastructure and of the role each tissue plays during the steps preceding germination. This paper describes the ultrastructure of Phelipanche seeds and contributes to our understanding of seed tissue function.
methodsSeeds of P. aegyptiaca were examined under light, scanning electron, transmission electron and fluorescence microscopy following various fixations and staining protocols. The results were interpreted with physiological data regarding mode of water absorption and germination stimulation. KEY RESULTS AND
conclusionsThe endothelium, which is the inner layer of the testa, rapidly absorbs water. Its interconnected cells are filled with mucilage and contain labyrinthine walls, facilitating water accumulation for germination that starts after receiving germination stimuli. Swelling of the endothelium leads to opening of the micropyle. The perisperm cells underneath this opening mediate between the rhizosphere and the embryo and are likely to be the location for the receptors of germination stimuli. The other perisperm cells are loaded with lipids and protein bodies, as are the endosperm and parts of the embryo. In the endosperm, the oil bodies fuse with each other while they are intact in the embryo and perisperm. Plasmodesmata connect the perisperm cells to each other, and the cells near the micropyle tightly surround the emerging seedling. These perisperm cells, and also the proximal embryo cells, have dense cytoplasmic contents, and they seem to represent the two seed components that are actively involved in transfer of reserve nutrients to the developing seedling during germination.
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