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首页> 外文期刊>Russian Journal of Plant Physiology >Activity of lectin-like proteins of the cell walls and the outer organelle membranes as related to endogenous ligands in cold-adapted seedlings of winter wheat
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Activity of lectin-like proteins of the cell walls and the outer organelle membranes as related to endogenous ligands in cold-adapted seedlings of winter wheat

机译：低温适应冬小麦幼苗细胞壁和外细胞器膜凝集素样蛋白活性与内源性配体的关系

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摘要

The hemagglutinating activity (HA) of lectin-like components in the cell walls and the outer organelle membranes was studied in freezing-tolerant winter wheat (Triticum aestivum L., cv. Mironovskaya 808) plants in the course of hardening at 2degreesC, in parallel with the effects of endogenous ligands from the soluble fraction on HA. Low hardening temperature divergently changed HA of the lectin-like components in the cell walls, the outer membranes of nuclei, plastids, and mitochondria, and the microsomal membranes: HA increased in the cell walls, nuclei, and plastids and decreased in the mitochondria and microsomal membranes. Under hardening conditions, with plant growth slowed down, HA of the lectin-like proteins from the outer organelle membranes was inhibited in the presence of the soluble fraction components (soluble ligands); such inhibition was not observed in the case of actively growing nonhardened seedlings. The authors put forward a hypothesis that the lectin-like proteins from both peripheral (cell walls) and intracellular (outer organelle membranes) compartments are essential for developing freezing tolerance. HA of the cell walls and the outer membranes of nuclei and plastids enhanced by hardening manifested positive correlation with freezing tolerance and negative correlation with the growth rate. In contrast, HA of the outer membranes of mitochondria and microsomes was positively related to plant growth and negatively, to freezing tolerance. As negative and positive effectors of membrane-dependent processes, the lectin-like components of the outer organelle membranes seem to control membrane functional activities in the course of cold adaptation.
机译：在2°C的条件下，在硬化过程中平行研究了耐寒冬小麦（Triticum aestivum L.，cv。Mironovskaya 808）植物细胞壁和外部细胞器膜中凝集素样成分的血凝活性（HA）。可溶性部分的内源性配体对HA的影响。较低的硬化温度使细胞壁，细胞核，质体和线粒体的外膜以及微粒体膜中的凝集素样成分的HA发生发散变化：HA在细胞壁，细胞核和质体中增加，而在线粒体和细胞质中降低微粒体膜。在硬化条件下，随着植物生长的减慢，在存在可溶性级分组分（可溶性配体）的情况下，来自外部细胞器膜的凝集素样蛋白的HA受到抑制。在未生长的未硬化幼苗中未观察到这种抑制作用。作者提出了一个假设，即来自外周（细胞壁）和细胞内（细胞器外膜）区室的凝集素样蛋白对于发展抗冻性至关重要。硬化增强的细胞壁和细胞核以及质体外膜的HA表现出与冷冻耐受性正相关，而与生长速率呈负相关。相比之下，线粒体和微粒体外膜的HA与植物的生长呈正相关，与冷冻耐受性呈负相关。作为膜依赖性过程的负效应和正效应，外细胞器膜的凝集素样成分似乎在冷适应过程中控制膜功能活动。

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