Influence of drought stress on the metabolite and ion composition in nectar and nectaries of different day- and night-flowering Nicotiana species.

IF 4.2 3区生物学 Q1 PLANT SCIENCES

Plant Biology Pub Date : 2025-02-18 DOI:10.1111/plb.70000

T Göttlinger, D Naegel, J E Dick, G Lohaus

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引用次数: 0

Abstract

The frequencies of droughts worldwide will increase in the future due to climate changes. Nectar composition of plant species varies in relation to pollinator and can also be influenced by drought. We investigated both different pollinated species and the effects of drought in parallel. In addition, the influence of drought on nectar production and metabolism in nectaries should be investigated, since very little is currently known about this. The influence of drought stress on nectaries, nectar and leaves of 4 day- and night-flowering Nicotiana species (pollinated by sunbirds, hummingbirds, hawkmoths or bats) were investigated. The nectar volume, as well as metabolite concentrations (sugars, amino acids), inorganic ions and starch were measured. PCA and PERMANOVA were applied to determine the relative importance of different drought conditions on metabolism of nectaries and nectar. Drought stress led to changes in composition of nectaries and nectar in all four Nicotiana species. The day-flowering species had relatively similar changes, whereas the night-flowering species differed from these and also from each other. Quantities of sugars, amino acids and inorganic ions per flower decreased sharply in all Nicotiana species because of a strong decrease in nectar volume. Drought stress not only compromises plant growth but also nectar secretion and composition. These changes are likely to affect plant-pollinator interactions and may negatively impact successful pollination.

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干旱胁迫对不同白花和夜花烟草花蜜代谢物和离子组成的影响。

由于气候变化，未来全球干旱的频率将会增加。植物种类的花蜜组成因传粉者而异，也可能受到干旱的影响。我们同时考察了不同传粉物种和干旱的影响。此外，干旱对花蜜生产和蜜腺代谢的影响应该进行研究，因为目前对此知之甚少。研究了干旱胁迫对日鸟、蜂鸟、飞蛾和蝙蝠授粉的4种白花和夜花烟叶蜜、花蜜和叶片的影响。测量了花蜜体积、代谢物浓度（糖、氨基酸）、无机离子和淀粉。应用PCA和PERMANOVA分析了不同干旱条件对蜜汁和花蜜代谢的相对重要性。干旱胁迫导致四种烟草的蜜腺和花蜜成分发生变化。白天开花的物种有相对相似的变化，而夜间开花的物种与这些物种不同，而且彼此之间也不同。糖、氨基酸和无机离子的数量在所有烟草品种的每朵花急剧下降，因为蜜量的强烈减少。干旱胁迫不仅影响植物的生长，而且影响花蜜的分泌和成分。这些变化可能会影响植物与传粉者的相互作用，并可能对成功授粉产生负面影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plant Biology 生物-植物科学

CiteScore

8.20

自引率

2.60%

发文量

109

审稿时长

3 months

期刊介绍： Plant Biology is an international journal of broad scope bringing together the different subdisciplines, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, and mycology. Plant Biology publishes original problem-oriented full-length research papers, short research papers, and review articles. Discussion of hot topics and provocative opinion articles are published under the heading Acute Views. From a multidisciplinary perspective, Plant Biology will provide a platform for publication, information and debate, encompassing all areas which fall within the scope of plant science.