Peculiarities of the formation of the caudiciform part of Petopentia natalensis (Schltr.) Bullock (Apocynaceae) Author Aviekin, Yaroslav Kyiv Taras Shevchenko National University, Educational and Scientific Centre « Institute of Biology and Medicine », str. Symona Petlyury, 1, 01032 Kyiv (Ukraine) avekinyarik@gmail.com nuzhynan@gmail.com Author Nuzhyna, Nataliia Kyiv Taras Shevchenko National University, Educational and Scientific Centre « Institute of Biology and Medicine », str. Symona Petlyury, 1, 01032 Kyiv (Ukraine) nuzhynan@gmail.com Author Gaidarzhy, Maryna Kyiv Taras Shevchenko National University, Educational and Scientific Centre « Institute of Biology and Medicine », str. Symona Petlyury, 1, 01032 Kyiv (Ukraine) gaidarzhy@ukr.net text Adansonia 2021 3 2021-02-08 43 3 19 30 journal article 10.5252/adansonia2021v43a3 1639-4798 4519145
TABLE 1. — Morphometric indices of tissues in plants of Petopentia natalensis (Schltr.) Bullock at different stages of ontogenesis. Abbreviation and symbol: BPS, basal part of the stem in juvenile and immature plants; *, P ≤ 0.05, comparative to the previous stage of ontogenesis.
Tissue thickness, μm (M±SD)
OrgansTissuesSeedlingsJuvenile plantsImmature plants
Upper part of theEpidermis–20.2±2.9–
stemPeridermPhellem–65.6±11.7127.4±35.7*
Phelloderm–42.3±7.279.8±11.3*
Cortical parenchyma–90.2±18.5165.3±39.6*
Phloem–54.1±7.893.7±31.3*
Xylem–128.5±28.4163.6±45.6*
Pith–119 ± 35.1165.6 ± 24.3*
HypocotylEpidermis19.7±2.821.5±3.1–
/ BPSPeridermPhellem–98.7±13.9255.2±62.8*
Phelloderm–74.2±11.5109.8±28.4*
Cortical parenchyma216.2 ± 41.1631.4±112.7*2284.7±295.9*
Protophloem / Phloem30.5±7.6//98.4±13.5*/216.1±34.2*
Protoxylem / Xylem55.7±14.3//134.2±38.7*/462.6±73.5*
Pith238.6 ± 57.2727.3 ± 132.1*14476 ± 911*
Main rootEpiblema36.1 ± 9.842.1 ± 10.3–
Exoderm57.2 ± 21.168.5 ± 19.2–
PeridermPhellem––176.8±32.2
Phelloderm––82.6±17.9
Cortical parenchyma144.6±45.1153.5±52.6246.4±62.3*
Protophloem / Phloem29.5±8.4//57.2±16.7*/59 ± 14.1
Protoxylem / Xylem36.3±11.1//88.1±20.2/438.1 ± 182.5*