Ontogenesis and functions of saxophone stem in<i>Acrocomia aculeata</i>(Arecaceae)

Jn, E Souza; Ribeiro, Leonardo Monteiro; Mercadante-Simões, Maria Olívia

doi:10.1093/aob/mcw215

Cited by 12 publications

(6 citation statements)

References 31 publications

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“…The embryonic axis of oblique position is in the proximal region, composed by two meristematic regions, the shoot meristem (plumule) and the root meristem. In the region of the root meristem, cells of smaller diameter, intensely ruddy, and in the shape of a shell are observed, the radicle; in the shoot meristem, which corresponds to the plumule, there are three leaf primordia that will form the first and second cataphyll and the eophyll, sequentially (Figures 3B-D and 4A), lined by a protoderm, as also observed in Acrocomia aculeata, Euterpe precatoria, and Syagrus inajai (Souza et al, 2017;Aguiar and Mendonça, 2003;Genovese-Marcomini et al, 2013). The distal region, which corresponds to the cotyledon blade, has a haustorial function, with an irregular surface and provascular bundles (Figures 3E and 4C-D).…”

Section: Resultssupporting

confidence: 57%

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Morphoanatomic and histochemical aspects of Elaeis oleifera (Kunth) Cortés seed

et al. 2020

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Elaeis oleifera is an oleaginous palm tree native to America. The fruit contains unsaturated fatty acid extracted from the mesocarp. The species is mainly used in breeding programs of E. guineensis in development of interspecific hybrids with higher oil yield and resistance to lethal yellowing. E. oleifera is propagated by seed, which requires the adoption of methods for breaking dormancy and increasing the germination rate. However, there are no studies on the morphology and anatomy of the seed and its ergastic substances; knowing its structure makes it possible to improve planting methods and make them more effective. The aim of the present study was to describe the morpho-anatomy and histochemistry of the seed, characterizing it and contributing information that assists in understanding dormancy. In seeds collected in the experimental area of Embrapa Amazônia Ocidental (Amazonas), morpho-anatomical and histochemical analysis was conducted to detect metabolites (starch, protein, lipids, carbohydrates, and phenolic compounds). The seeds vary in shape, oblong and ovate. The embryo has an oblique embryonic axis, composed of root apical meristem and shoot apical meristem with three leaf primordia. Phenolic compounds were found throughout the seed coat; there are lipids, protein, and pectin in the embryo and endosperm.

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Section: Resultssupporting

confidence: 57%

“…The endosperm is white, with an oily, solid, and abundant appearance and is in direct contact with the seed coat (Figure 1B), a characteristic also observed in Butia capitata (Oliveira et al, 2013) and in Acrocomia aculeata (Souza et al, 2017).…”

Section: Resultsmentioning

confidence: 64%

Morphoanatomic and histochemical aspects of Elaeis oleifera (Kunth) Cortés seed

et al. 2020

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“…The last phases exhibit an increase in growth of the shoot, taproot, and haustorium, as well as a reduction in water content (Mazzottinidos-Santos et al 2017). Acrocomia seedlings develop a tuberous underground system (i.e., saxophone stem structure) that stores reserves and results from the growth, curvature, and expansion of the embryo (Souza et al 2017b). This structure influences the distribution of the root system (Moreira et al 2019).…”

Section: Seedling Developmentmentioning

confidence: 99%

Acrocomia spp.: neglected crop, ballyhooed multipurpose palm or fit for the bioeconomy? A review

Vargas‐Carpintero

Hilger

Mössinger

et al. 2021

Agron. Sustain. Dev.

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Acrocomia spp., a genus of wild-growing palms in the neotropics, is rapidly gaining interest as a promising multipurpose crop. Diverse products can be derived from various components of the palm, the oils being of highest interest. Acrocomia shows similar oil yield and fatty acid composition to the African oil palm (Elaeis guineensis). It is, however, able to cope with a wider range of environmental conditions, including temporary water scarcity and lower temperatures, thus potentially a more sustainable alternative to its tropical counterpart. Acrocomia’s research history is recent compared to other traditional crops and thus knowledge gaps, uncertainty, and challenges need to be addressed. This review attempts to assess the acrocomia’s preparedness for cultivation by highlighting the state-of-the-art in research and identifying research gaps. Based on a systematic literature search following a value web approach, it (a) provides a comprehensive overview of research topics, (b) shows the development of publication activities over time and the drivers of this development, and (c) compiles main findings to assess the acrocomia’s preparedness for commercial cultivation. Our results confirm its multipurpose characteristic as a potential feedstock for manifold sectors. Research has continued to increase over the last decade, especially on A. aculeata and is driven by the interest in bioenergy. Increasing knowledge on botany has contributed to understanding the genetic diversity and genus-specific biology. This has enabled applied research on seed germination and propagation toward domestication and initial plantation activities, mostly in Brazil. Main research gaps are associated with genotype–environment interaction, planting material, crop management, and sustainable cropping systems. Overall, we conclude that acrocomia is at an early phase of development as an alternative and multipurpose crop and its up-scaling requires the integration of sustainability strategies tailored to location-based social-ecological conditions.

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“…The positive geotropic growth of the cotyledonary petiole that promotes the burial of the vegetative axis is considered an important strategy for protection against desiccation, fire, herbivory, and anthropic impacts, and shows great adaptive value in dry environments (Souza et al, 2017;Xiao et al, 2019). We observed that the vegetative axis of A. vitrivir becomes buried several centimeters below the soil surface after germination, where it remains protected, with the emission of the first eophyll occurring only approximately 60 days later.…”

Section: Structural and Ecophysiological Aspects Of Shading Responsesmentioning

confidence: 78%