Karyological Investigation on Three &lt;i&gt;Zephyranthes&lt;/i&gt; Species and Its Taxonomic Significance

Dash, Chandan Kumar; Rahman, M. Sohel; Sultana, Syeda Sharmeen

doi:10.1508/cytologia.85.163

Cited by 5 publications

(4 citation statements)

References 22 publications

(31 reference statements)

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“…Por su par-te, H. tubispathus es una especie poliploide con distintos niveles de ploidía, aunque el guarismo tetraploide con 2n = 4x = 24 es el más frecuente en la naturaleza (Flory, 1948;Coe, 1954;Flory y Flagg, 1958;Tandon Meenakshi, 1965;Lakshmi, 1980;Joshi 1982;Zemskova y Sveshnikova 1999;Daviña y Honfi, 2018;Gianini Aquino et al, 2020;Gianini Aquino, 2023). Además, en esta especie se registraron aneuploidías y citotipos infrecuentes con 2n = 30 (Naranjo, 1969), 2n = 36 (Daviña y Honfi, 2018) y 2n = 48 (Sveshnikova y Zemskova, 1988;Dash et al, 2020). Las procedencias de H. tubispathus de Paraguay concuerdan con los registros citológicos tetraploides previos de la especie.…”

Section: Discussionunclassified

Niveles de ploidía en plantas nativas y cultivadas de la familia Amaryllidaceae del Paraguay

Irala,

Gianini Aquino,

Rodriguez Mata

et al. 2023

Stev.

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La tribu Hippeastreae es compleja taxonómicamente, cariológicamente variable y posee importancia fitoquímica y ornamental, cuyo centro de distribución se encuentra en la región subtropical de Sudamérica. Particularmente, Paraguay dispone de escasa información sobre citología y reproducción de procedencias nativas de esta tribu. A fin de contribuir con la caracterización de fitorecursos paraguayos nativos de la tribu, se ha determinado el nivel de ploidía con técnicas citogenéticas, citometría de flujo y caracterización reproductiva sobre fertilidad. Se analizaron individuos de poblaciones naturales y de material cultivado del Departamento Central, Paraguay, durante los años 2019 y 2022. Se encontraron los siguientes números somáticos: Habranthus brachyandrus (Baker) Sealy, 2n = 4x = 24; Habranthus tubispathus (L’Hér.) Traub, 2n = 4x = 24; Hippeastrum puniceum (Lam.) Voss, 2n = 2x = 22; H. vittatum (L’Her.) Herb., 2n = 4x = 44; y Z. mesochloa Herb. ex Lindl., 2n = 2x = 12. Mediante citometría de flujo en tejidos foliares se confirmó el nivel de ploidía diploide en individuos de Hippeastrum reticulatum (L’Hér.) Herb (2n = 2x = 22) y tetraploide en Habranthus brachyandrus (2n = 4x = 24). La fertilidad analizada por la viabilidad de polen y producción media de semillas fue de 79% y 20 semillas por cápsula en Hippeastrum puniceum, 96% y 12 semillas/cápsula en H. vittatum, 83% y 43,75 semillas/cápsula en Z. mesochloa y 65,25 semillas/ cápsula en Habranthus brachyandrus. Los aportes sobre fertilidad, números cromosómicos y nivel de ploidía de Habranthus brachyandrus, H. tubispathus, Hippeastrum vittatum y H. reticulatum son primicia para Paraguay.

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Section: Discussionunclassified

Niveles de ploidía en plantas nativas y cultivadas de la familia Amaryllidaceae del Paraguay

Irala,

Gianini Aquino,

Rodriguez Mata

et al. 2023

Stev.

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“…were cytotaxonomically studied to characterize and elucidate probable evolutionary relationship among them. These species were found to possess different chromosome number and karyotype formula (Dash et al, 2020). Megasporogenesis and megagametogenesis in Z. candida (Lindl.)…”

Section: Discussionmentioning

confidence: 99%

“…New geophytes for Tunisian and North African alien flora and among them Z. candida have been studied by Mokni et al (2020). Karyological investigation on three Zephyranthes species and its taxonomic significance was described by Bangladesh researchers (Dash et al, 2020). Taxonomy and reproductive biology of the genus Zephyranthes in Bangladesh were studied (Afroz et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Micromorphology and anatomy of the flower of Zephyranthes candida (Amaryllidaceae)

Fishchuk

2021

Regul. Mech. Biosyst.

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The use of morphological features of flowers in the taxonomy of plants is becoming increasingly important. The structure of the Zephyranthes candida (Lindl.) Herb. flowers on permanent cross-sectional and longitudinal sections was studied using a light microscope. The genus Zephyranthes belongs to the subtribe Hippeastrinae Walp. tribe Hippeastreae Sweet., family Amaryllidaceae s.l. Microscopic studies of the flower are considered as a tool to identify hitherto unknown structural adaptations of plants to specialized pollination methods and to elucidate the first stages of fruit morphogenesis, as many features of the fruit appear at the flower stage. The morphometric parameters, morphology, anatomy, and vascular anatomy of the ovary were described by using the flower’s transverse sections. Ten flowers of Z. candida were sectioned using standard methods of Paraplast embedding and serial sectioning at 20 μm thickness. Sections were stained with Safranin and Astra Blau and mounted in Eukitt. It was found that in the studied species the tepals have multi-bundle traces of 10–12 leading bundles. We consider the gynoecium of the studied species to be eusincarpous. The vascular system of the inferior ovary consists of three dorsal and three septal bundles, paired ventral bundles of carpels, which form ovule traces. For the first time, the presence of the following gynoecium zones was detected: a synascidiate structural zone with a height of about 360 μm and a fertile symplicate structural zone with a height of about 1560 μm and a hemisymplicate zone of 480 μm. Septal nectaries appear in the hemisymplicate zone and open with nectary split at the base of the style, the total height of the septal nectary is 760 μm. The ovary roof is 280 μm. Bifurcated dorsal and septal bundles of carpels have been identified, which can be considered as adaptations of the early stages of fruit morphogenesis to opening. Anatomical features of the ovary of Z. candida are numerous vascular bundles in the pericarpium, non-lignified endocarp at the flower stage, we consider as adaptations to the formation of juicy fruit. New data on the anatomical structure of the flower are a significant addition to the information on antecological and post-anthetic features of the studied species. Also, these data can be used in the construction of parsimony branches of the family Amaryllidaceae.

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“…Z. carinata характеризувався наявністю тунікатних цибулин, рожевих квіток, субеліптичною до довгасто-ланцетоподібної оцвітини, вузьколінійними пиляками, ниткоподібним стовпчиком, темно-зеленими плодами та кутастим насінням. Наявність тунікатних цибулин, лінійних листків, жовтих квітів, жолобоподібної оцвітини, лінійних пиляків, ниткоподібного стовпчика, жовтувато-зелених плодів та довгастих насінин були ключовими ознаками, як це спостерігається у Z. tubispatha [10].…”

Section: результати досліджень та їх обговоренняunclassified

Морфологія Та Васкулярна Анатомія Квітки Zephyranthes Citrina Baker. (Amaryllidaceae J. St.-Hil.)

Fishchuk

2022

TernopilBioSciIssues

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In the gynoecium of Zephyranthes citrina Baker. there are synascidiate, symplicate, and hemisymplicate vertical zones. The longest zone is the fertile hemisymplicate zone and the shortest one is the sterile synascidiate zone in the ovary. It was determined that in Z. citrina the peduncle consists of 12 vascular bundles, which gather above the center in a dense circle, but do not form a vascular cylinder, and at the level of receptacle septal vascular bundles and dorsal vascular bundles depart, from which above traces of tepal depart. Dorsal and septal vascular bundles of the carpel are two-bundle. In the center of the ovary at the level of the locules there is a glandular slit which points to the presence of a symplicate zone and a circle of small vascular bundles – the roots of the ventral complex. Higher these bundles are reorganized into 6 massive vascular bundles and supplied the ovules – the ventral bundles of carpels. There are 14-20 ovules in each locul, the trace of the ovule is one-bundle. Traces of outer tepals have 12 vascular bundles, traces of inner tepals have 10 vascular bundles. Traces of stamens are single- bundle.

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Karyological Investigation on Three <i>Zephyranthes</i> Species and Its Taxonomic Significance

Cited by 5 publications

References 22 publications

Niveles de ploidía en plantas nativas y cultivadas de la familia Amaryllidaceae del Paraguay

Niveles de ploidía en plantas nativas y cultivadas de la familia Amaryllidaceae del Paraguay

Micromorphology and anatomy of the flower of Zephyranthes candida (Amaryllidaceae)

Морфологія Та Васкулярна Анатомія Квітки Zephyranthes Citrina Baker. (Amaryllidaceae J. St.-Hil.)

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