Yield reduction caused by elevated temperatures and high nitrogen fertilization is mitigated by SP6A overexpression in potato (Solanum tuberosum L.).
Yield reduction caused by elevated temperatures and high nitrogen fertilization is mitigated by SP6A overexpression in potato (Solanum tuberosum L.).
复制标题
马铃薯 (Solanum tuberosum L.) 中 SP6A 的过度表达可以缓解因高温和高氮肥造成的产量下降。
DOI：
10.1111/tpj.16679
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Sophia Sonnewald
中科院分区：
文献类型：
--
作者：
Lisa Koch;Günter G. Lehretz;U. Sonnewald;Sophia Sonnewald
马铃薯(Solanum tuberosum L.)是全球数百万人的基本主食。它们提供必需的氨基酸、维生素和淀粉--这是人类饮食的重要组成部分，提供能量，也是纤维的来源。不幸的是，全球变暖正在对这种作物构成严重威胁，导致重大产量损失，从而危及全球粮食安全。传统上，工业化农业依靠过量的氮肥来提高产量。然而，这在抗击马铃薯因高温造成的产量损失方面是否有效仍不确定。因此，本研究旨在探讨高温胁迫和氮肥对马铃薯块茎形成的综合效应。我们证明了氮素水平和温度对块茎发育有显著影响。高N和高温的结合延迟了块茎的形成，而N缺乏可能通过饥饿诱导的信号启动早期块茎形成，而不依赖于块茎形成的关键调节因子--自我修剪6A(SP6A)。我们还发现，高氮水平与高温相结合会降低块茎产量，而不是提高产量。然而，我们的研究表明，在这些抑制条件下，SP6A的过表达可以促进块茎的形成。通过利用过剩的氮素积累块茎生物量，过量表达SP6A的植物表现出生物量分配向块茎转移。这导致了与野生型植物相比的产量增加。我们的结果强调了SP6A过度表达作为一种可行的策略，在面对全球变暖的情况下确保马铃薯稳定产量的作用。因此，我们的发现为影响马铃薯作物产量的复杂因素提供了洞察力。
Potatoes (Solanum tuberosum L.) are a fundamental staple for millions of people worldwide. They provide essential amino acids, vitamins, and starch - a vital component of the human diet, providing energy and serving as a source of fiber. Unfortunately, global warming is posing a severe threat to this crop, leading to significant yield losses, and thereby endangering global food security. Industrial agriculture traditionally relies on excessive nitrogen (N) fertilization to boost yields. However, it remains uncertain whether this is effective in combating heat-related yield losses of potato. Therefore, our study aimed to investigate the combinatory effects of heat stress and N fertilization on potato tuber formation. We demonstrate that N levels and heat significantly impact tuber development. The combination of high N and heat delays tuberization, while N deficiency initiates early tuberization, likely through starvation-induced signals, independent of SELF-PRUNING 6A (SP6A), a critical regulator of tuberization. We also found that high N levels in combination with heat reduce tuber yield rather than improve it. However, our study revealed that SP6A overexpression can promote tuberization under these inhibiting conditions. By utilizing the excess of N for accumulating tuber biomass, SP6A overexpressing plants exhibit a shift in biomass distribution towards the tubers. This results in an increased yield compared to wild-type plants. Our results highlight the role of SP6A overexpression as a viable strategy for ensuring stable potato yields in the face of global warming. As such, our findings provide insights into the complex factors impacting potato crop productivity.
影响因子：
7.3
作者：
Hastilestari, Bernadetta Rina;Lorenz, Julia;Sonnewald, Sophia
通讯作者：
Sonnewald, Sophia