Plant shoot tips do not survive exposure to liquid nitrogen temperatures without cryoprotective treatments. Some cryoprotectant solutions, such as plant vitrification solution 2 (PVS2), dehydrate cells and decrease lethal ice formation, but the extent of dehydration and the effect on water freezing properties are not known. We examined the effect of a PVS2 cryoprotection protocol on the water c...

Many plant species can be cryopreserved by treating shoot tips with complex cryoprotectant solutions before rapidly cooling them to liquid nitrogen temperatures. Plant vitrification solution 2 (PVS2), a commonly selected cryoprotectant, can be lethal with extended exposure times. To determine potentially toxic combinations, we have exposed mint shoot tips to one-, two-, three-, and four-compone...

This study aimed to establish a cryopreservation protocol for embryogenic cultures of A. angustifolia, enabling the ex situ conservation of the species. Embryogenic cultures were established from immature seeds and treated with variations of the cryoprotectant solutions SuDG, SoD and PVS2 prior to immersion in liquid nitrogen. Cell viability was evaluated after 30, 60 and 90 days of re-growth. ...

Encapsulation-dehydration and PVS2-vitrification cryopreservation protocols were evaluated for the long-term conservation of a diverse group of Rubus germplasm. Cold acclimation for a 4-week period prior to cryopreservation was necessary for regrowth of shoot apices from blackberry and raspberry genotypes. For the encapsulation-dehydration protocol, encapsulated apices were pretreated in 0.75 M...

In this study, whether the addition of antifreeze protein (AFP) to a cryopreservative solution (plant vitrification 2 (PVS2)) is more effective in reducing freezing injuries Hosta capitata than PVS2 alone at different cold exposure times (6, 24, and 48 h) investigated. The upregulation C-repeat binding factor 1 (CBF1) dehydrin (DHN1) response low temperature was observed shoots. Shoots treated ...

Heterogeneity in morphology, physiology and cellular chemistry of plant tissues can compromise successful cryoprotection and cryopreservation. Cryoprotection is a function of exposure time × temperature × permeability for the chosen protectant and diffusion pathway length, as determined by specimen geometry, to provide sufficient dehydration whilst avoiding excessive chemical toxicity. We have ...

This study reports on the cryostorage of embryogenic lines derived from selected mature Quercus robur trees, following application of the PVS2-vitrification based procedure. In seven oak genotypes, embryo recovery levels ranging from 57-92% were obtained when 4-6 mg embryo clumps were precultured for 3 days on 0.3 M sucrose basal medium, treated with PVS2 solution for 60 min at 24 degrees C, an...

Abstract The objective of this study was to evaluate the efficiency cryoprotective solution (PVS2) combined with phloroglucinol for cryopreservation seeds two orchid species, Encyclia cordigera and Epidendrum ciliare. Seeds had 91.03% initial viability 91.99% germination. treatment PVS2 at 0 °C 1% 60 min returned 93.79% 91.01% germination after recovery from LN, consequently resulting in faster...

In vitro shoot tips of Capparis spiunosa were cryopreserved using the vitrification, encapsulation/ dehydration and encapsulation vitrification techniques. In the vitrification procedure, a maximum of 70% regrwoth was obtained when shoot tips were treated with the Plant vitrification solution (PVS2) for 60 min at 0°C and plunged directly into liquid nitrogen. In encapsulation dehydration, shoot...