Epidermis characteristics of the seedlings of the Cactoideae (Cactaceae) plants

Kalashnyk, H.V.; Gajdarzhy, Marina M

doi:10.15407/ukrbotj72.05.498

Cited by 1 publication

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“…According to Vasilyev's classification [26], the thicknesses of the outer walls of the epidermal cells ranges from thin (R. flavistyla) to very thick (A. myriostigma, O. celsianus). The epidermal cells in the paradermal plane are large with flexuous or sinuous anticlinal walls [28]. However, the small sized epidermal cells are typical for plants growing in dry regions [29].…”

Section: Discussionmentioning

confidence: 99%

Anatomical and morphological features of seedlings of some Cactoideae Eaton (Cactaceae Juss.) species

Kalashnyk¹,

Nuzhyna²,

Gaidarzhy³

2016

Acta Agrobot

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Three-month-old seedlings of 11 species of the subfamily Cactoideae (Melocactus bahiensis, Melocactus curvispinus, Echinopsis eyriesii, E. mirablis, E. peruviana, Oreocereus celsianus, Rebutia flavistyla, Rebutia minuscula, Astrophytum myriostigma, Mamillaria columbiana, and M. prolifera) have been studied. These plants exhibit a uniseriate epidermis, covered by a thin cuticle. Except for E. peruviana and A. myriostigma, no hypodermis could be detected. The shoots of all studied specimens consist mainly of cortex parenchyma with large thin-walled cells. The pith parenchyma is composed of much smaller cells. Due to the fact that the cortex parenchyma comprises the largest portion of the cross-sectional area, it can be concluded that it is the main water-storing tissue. The extent of vascular tissue development varies. Collateral vascular bundles are present in the stele. The studied seedlings contain various ergastic substances, in particular inclusions of calcium oxalate (all studied species), starch (Mammillaria prolifera, E. mirabilis, and the genus Melocactus), inulin-like inclusions, and occasionally lipid drops (some Echinopsis species).Thus, it was found that all studied plants have a highly specialized anatomical and morphological structure. At the same time, the epidermis and hypodermis are poorly developed. Accordingly, the adaptation to arid conditions of the examined seedlings involves an increased growth of the water-storing tissue and the production of ergastic substances.

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Section: Discussionmentioning

confidence: 99%