The Application of Auxin-like Compounds Promotes Cold Acclimation in the Oilseed Rape Plant

Abstract

Cold is a major environmental key factor influencing plant growth, development, and productivity. Responses and adaption processes depend on plant physiological and biochemical modifications, first of all via the hormonal system. Indole-3-acetic acid (IAA) plays a critical role in the processes of plant functioning. To assess the influence of the auxin-like compounds 1-[2-chloroethoxycarbonylmethyl]-4-naphthalenesulfonic acid calcium salt (TA-12) and 1-[2-dimethylaminoethoxycarbonylmethyl]naphthalene chloromethylate (TA-14) in the process of cold acclimation, long-term field trials over four years were performed with two rapeseed (Brassica napus L.) plant cultivars with different wintering resistance in temperate-zone countries. In these two rapeseed cultivars, namely ‘Casino’ (less resistant) and ‘Valesca’ (more resistant), investigations were conducted in the terminal buds and root collars. The application of auxin-like compounds revealed a close interlinkage between the composition of dehydrins and the participation of the phytohormone IAA in the adaptation processes. By applying TA-12 and TA-14, the importance of the proteins, especially the composition of the dehydrins, the IAA amount, and the status of the oilseed rape cultivars at the end of the cold acclimation period were confirmed. Following on from this, when introducing oilseed rape cultivars from foreign countries, it may also be of value to assess their suitability for cultivation in temperate-zone countries.

Identification and Analysis of the CBF Gene Family in Three Species of Acer under Cold Stress

“…These results suggested that significant differences existed in three Acer species CBFs genes. 1 The number of amino acids, 2 Molecular weight, 3 Isoelectric point, 4 Subcellular localization.…”

“…Plants can adapt to low temperatures through inducing the expression of cold tolerance-related genes, synthesizing corresponding protective proteins, and activating the protective enzymes and metabolites, and the process is called cold acclimation [2]. The cold acclimation natural habitat plants have the ability to acclimate completely, whereas plants originating from warmer climatic zones cannot often successfully overwinter, due to poor preparation for cold acclimation [3].…”

Oilseed Rape: Biology, Use, Current Cultivation Issues and Agronomic Management

“…Temperature higher than 30°C is harmful for pollination and shortens the pod and seed development phase, thus reducing yield and quality. Moreover, high temperature during winter hastens plant growth, shortens the growing season, and reduces yield potential [18,25].…”

“…Low temperatures mainly damage the root collars and terminal buds of winter oilseed rape. Also, winter oilseed rape is sensitive to spring temperature fluctuations, as the plant consumes many nutrients during the winter and is, therefore, most vulnerable at that time [25][26][27].…”

“…has been tested and used till now. Scientific studies show that the effect of exogenous compounds can cause physiological changes in the plant cell and change the defence response to biotic and abiotic environmental factors [3,25,37,38].…”