Abstract
Xyridaceae comprise two subfamilies: Xyridoideae and Abolbodoideae, which are morphologically distinct. Orectanthe belongs to Abolbodoideae and comprises two species with restricted distribution. The anatomy of root, stem, leaf, and inflorescence axis of Orectanthe sceptrum was studied aiming to characterize the species in a comparative approach. The anatomy of the roots is first described here for the genus and they are characterized by presenting two distinct patterns according to their developmental stage and function. Intracellular papillae were observed in the epidermal and cortical cells, increasing the root absorption surface. These papillae are exclusive of O. sceptrum within the family as well as the following characteristics: epidermal cells with thickened outer periclinal walls in the stem, epidermal cells with U-shaped thickened walls in the leaf blade, and chlorenchyma with arm cells in both the leaf blade and inflorescence axis. Orectanthe shares with Abolboda an indistinct endodermis in the stem and a hypodermis beneath both leaf surfaces and in the inflorescence axis. A continuous pericycle in the root, stomata restricted to the abaxial surface of the leaf blade, vascular bundles with sheath extensions distributed in a single row in the mesophyll, and large lacunae in the leaf sheath are features shared by Orectanthe, Abolboda, and Aratitiyopea, characterizing Abolbodoideae. A great similarity was observed between Abolbodoideae and Eriocaulaceae, as both have roots with heterogeneous cortex and continuous pericycle, and bifacial, hypostomatic leaves presenting hypodermis and vascular bundles with sheath extensions.
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Claims 9
Claim · model-written summary
Roots have two patterns according to developmental stage and function.
- Taxon
- Orectanthe sceptrum
Orectanthe sceptrumt0 - Organ / stage
- rootse0
- Outcome
- two distinct patternse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“roots is first described here for the genus and they are characterized by presenting two distinct patterns according to their developmental stage and function”
Claim · model-written summary
Intracellular papillae occur in epidermal and cortical cells and increase root absorption surface.
- Taxon
- Orectanthe sceptrumOrectanthe sceptrumt0
- Organ / stage
- epidermal and cortical cellse0
- Outcome
- Intracellular papillaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“Intracellular papillae were observed in the epidermal and cortical cells, increasing the root absorption surface”
Claim · model-written summary
The papillae are exclusive to this species within the family.
- Taxon
- O. sceptrumOrectanthe sceptrume0
- Outcome
- papillaee0
- Qualifier
- exclusive of O. sceptrum within the familye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“These papillae are exclusive of O. sceptrum within the family”
Claim · model-written summary
The stem has epidermal cells with thickened outer periclinal walls, exclusive within the family.
- Taxon
- Orectanthe sceptrumOrectanthe sceptrumt0
- Organ / stage
- steme0
- Outcome
- epidermal cells with thickened outer periclinal wallse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“epidermal cells with thickened outer periclinal walls in the stem”
Claim · model-written summary
The leaf blade has epidermal cells with U-shaped thickened walls.
- Taxon
- Orectanthe sceptrumOrectanthe sceptrumt0
- Organ / stage
- leaf bladee0
- Outcome
- epidermal cells with U-shaped thickened wallse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“epidermal cells with U-shaped thickened walls in the leaf blade”
Claim · model-written summary
Arm-cell chlorenchyma occurs in leaf blades and inflorescence axes.
- Taxon
- Orectanthe sceptrumOrectanthe sceptrumt0
- Organ / stage
- leaf blade and inflorescence axise0
- Outcome
- chlorenchyma with arm cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“chlorenchyma with arm cells in both the leaf blade and inflorescence axis”
Claim · model-written summary
Orectanthe and Abolboda share an indistinct stem endodermis and a hypodermis in leaves and inflorescence axes.
- Taxon
- Orectanthe
Orectanthee0 - Outcome
- indistinct endodermis in the stem and a hypodermis beneath both leaf surfaces and in the inflorescence axise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“Orectanthe shares with Abolboda an indistinct endodermis in the stem and a hypodermis beneath both leaf surfaces and in the inflorescence axis”
Claim · model-written summary
Orectanthe, Abolboda, and Aratitiyopea share a continuous root pericycle and several leaf anatomical traits.
- Taxon
- OrectantheOrectanthee0
- Outcome
- A continuous pericycle in the root, stomata restricted to the abaxial surface of the leaf blade, vascular bundles with sheath extensions distributed in a single row in the mesophyll, and large lacunae in the leaf sheathe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Orectanthe sceptrum”
e0“A continuous pericycle in the root, stomata restricted to the abaxial surface of the leaf blade, vascular bundles with sheath extensions distributed in a single row in the mesophyll, and large lacunae in the leaf sheath are features shared by Orectanthe, Abolboda, and Aratitiyopea”
Claim · model-written summary
Abolbodoideae and Eriocaulaceae showed great anatomical similarity.
Verbatim
t0“Orectanthe sceptrum”
e0“A great similarity was observed between Abolbodoideae and Eriocaulaceae”