Coquerel Raphaël, Arkoun Mustapha, Dupas Quentin, Leroy Fanny, Laîné Philippe, Etienne Philippe
Unicaen, INRAE, UMR 950 EVA, SF Normandie Végétal (FED4277), Normandie Université, 14000 Caen, France.
Laboratoire de Nutrition Végétale, Agro Innovation International-TIMAC AGRO, 35400 Saint-Malo, France.
Plants (Basel). 2023 Jun 8;12(12):2248. doi: 10.3390/plants12122248.
In many crops species, sulfur (S) deprivation negatively affects growth, seed yield quality and plant health. Furthermore, silicon (Si) is known to alleviate many nutritional stresses but the effects of Si supply on plants subjected to S deficiency remain unclear and poorly documented. The objective of this study was to evaluate whether Si supply would alleviate the negative effects of S deprivation on root nodulation and atmospheric dinitrogen (N) fixation capacity in subjected (or not) to long-term S deficiency. For this, plants were grown for 63 days in hydroponic conditions with (500 µM) or without S and supplied (1.7 mM) or not with Si. The effects of Si on growth, root nodulation and N fixation and nitrogenase abundance in nodules have been measured. The most important beneficial effect of Si was observed after 63 days. Indeed, at this harvest time, a Si supply increased growth, the nitrogenase abundance in nodules and N fixation in S-fed and S-deprived plants while a beneficial effect on the number and total biomass of nodules was only observed in S-deprived plants. This study shows clearly for the first time that a Si supply alleviates negative effects of S deprivation in .
在许多作物品种中，缺硫（S）会对生长、种子产量质量和植株健康产生负面影响。此外，已知硅（Si）能缓解多种营养胁迫，但硅供应对缺硫植株的影响仍不明确且记录较少。本研究的目的是评估硅供应是否会减轻长期缺硫（或不缺硫）植株根瘤形成和大气二氮（N）固定能力方面的缺硫负面影响。为此，将植株在水培条件下培养63天，分别供应（500µM）或不供应硫，并供应（1.7mM）或不供应硅。测定了硅对生长、根瘤形成、固氮以及根瘤中固氮酶丰度的影响。63天后观察到硅最重要的有益作用。实际上，在这个收获期，供应硅增加了供应硫和缺硫植株的生长、根瘤中固氮酶丰度和固氮量，而对根瘤数量和总生物量的有益作用仅在缺硫植株中观察到。本研究首次明确表明，供应硅可减轻缺硫在……方面的负面影响。
