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Phenolic compounds in Norway spruce as affected by boron nutrition at the end of the growing season.

机译：在生长季节结束时，挪威的酚类化合物会受到硼营养的影响而迅速生长。

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The increase in concentrations of phenolic compounds in boron (B) deficiency has been demonstrated in many herbaceous plant species, but information on woody plants is scarce. It has been suggested that accumulation of phenolic compounds plays a role in the development of cold hardiness in herbaceous plants but also that B deficiency decreases winter hardiness. Here we study the effects of B nutrition on phenolic compounds in Norway spruce (Picea abies L.) in the course of cold acclimation. Phenolic compounds were analysed in Norway spruce seedlings from three different B-fertilisation treatments in two harvests: non-acclimated and cold-acclimated seedlings. Norway spruce phenolic compounds consisted mainly of condensed tannins. During B deficiency, condensed tannins and monocoumaroyl-astragalin der. 1 increased in non-acclimated seedlings. The increase in tannins was 21%, which was nearly significant. However, the effect of B on phenolic compounds was almost absent in cold-acclimated seedlings. The condensed tannin concentration increased much more with time in the simulated autumn than due to B deficiency, and we conclude that the B effect was probably not large enough to be important for the hardening of the seedlings. The total phenolic concentrations more than doubled during the course of cold hardening suggesting that phenolics have a role in the winter hardiness in Norway spruce..
机译：在许多草本植物物种中均已证明，硼（B）缺乏症中酚类化合物的浓度增加，但是关于木本植物的信息很少。有人认为，酚类化合物的积累在草本植物的抗寒性发展中起着一定作用，但B缺乏会降低冬季抗寒性。在这里，我们研究了冷养过程中B营养对挪威云杉（Picea abies L.）中酚类化合物的影响。在挪威云杉幼苗中，对三种收获期的三种不同B施肥处理中的酚类化合物进行了分析：未驯化和冷驯化的幼苗。挪威云杉酚类化合物主要由缩合单宁组成。 B缺乏时，单宁和单香豆酰-阿斯达加林der缩合。在未适应的幼苗中增加1。单宁的增加为21％，几乎是显着的。然而，在冷适应的幼苗中几乎没有B对酚类化合物的影响。在模拟的秋季，单宁浓度随时间的增加比由于缺乏B而增加的更多，因此我们得出结论，B的作用可能不足以对幼苗的硬化起重要作用。在冷硬化过程中，总酚浓度增加了一倍以上，这表明酚醛在挪威云杉的冬季坚韧性中发挥了作用。

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