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Causes and Consequences of Cytonuclear Incompatibility in Hybrids of Flowering Plants. 开花植物杂交细胞核不亲和的原因与后果。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/erag075
Mehrdad Shahbazi, Joel Sharbrough, Jana Knerova, Jonathan F Wendel, David Kopecky

Hybridization and polyploidization combine divergent nuclear genomes with maternally inherited organelles, often disrupting cytonuclear coadaptation critical for respiration and photosynthesis. This review examines the mechanisms, outcomes, and evolutionary significance of cytonuclear incompatibility in plants. We focus on how divergence in nuclear-encoded, organelle-targeted proteins and organelle genomes leads to mismatched interactions in protein import, folding, and assembly of multi-subunit enzyme complexes. The evidence highlights taxon- and complex-specific responses that mitigate incompatibilities, including the biased retention and expression of maternal alleles, gene conversions, and regulatory adjustments. We highlight how cytonuclear compatibility in hybrid lineages entails responses at multiple levels of regulation, including methylation/chromatin accessibility, gene expression, alternative splicing, translation rates, organelle import, protein-folding and assembly, and protein degradation pathways. Manifestations such as chlorosis, seed sterility, or hybrid breakdown underscore their role in shaping reproductive barriers. Conversely, maternal bias and compensatory mechanisms often act to restore functional integration of parental genomes, allowing hybrid and polyploid persistence. Beyond their evolutionary role in speciation and adaptation, cytonuclear incompatibilities underpin key practical applications, notably cytoplasmic male sterility, a cornerstone of hybrid crop breeding. We conclude that cytonuclear dynamics reveal both constraints and opportunities, illuminating plant diversification, hybrid resilience, and agricultural innovation.

杂交和多倍体化将不同的核基因组与母系遗传的细胞器结合在一起,经常破坏对呼吸和光合作用至关重要的细胞核共适应。本文综述了植物细胞核不亲和性的机制、结果及其进化意义。我们关注核编码、细胞器靶蛋白和细胞器基因组的差异如何导致蛋白质输入、折叠和多亚基酶复合物组装中的不匹配相互作用。证据强调了减轻不相容的分类群和复合物特异性反应,包括母体等位基因的偏保留和表达、基因转换和调节调整。我们强调了杂交谱系中的细胞核相容性如何在多个调控水平上产生反应,包括甲基化/染色质可及性、基因表达、选择性剪接、翻译率、细胞器输入、蛋白质折叠和组装以及蛋白质降解途径。表现为黄化、种子不育或杂交破坏强调了它们在形成生殖障碍中的作用。相反,母体的偏倚和补偿机制通常会恢复亲本基因组的功能整合,从而允许杂交和多倍体的持续存在。除了在物种形成和适应方面的进化作用外,细胞核不亲和性还支撑着关键的实际应用,特别是细胞质雄性不育,这是杂交作物育种的基石。我们的结论是,细胞核动力学揭示了限制和机遇,阐明了植物多样化,杂交弹性和农业创新。
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引用次数: 0
The chloroplast-localized ABC transporter OsABCB24 regulates aleurone cell size and grain nutritional quality in rice by modulating auxin homeostasis. 叶绿体定位ABC转运蛋白OsABCB24通过调节生长素稳态调节水稻糊粉细胞大小和籽粒营养品质。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf445
Yang Yang, Zhong Tang, Wen-Wen Zhang, Xin-Yuan Huang, Fang-Jie Zhao

The aleurone in cereal grains is an outer cell layer enriched with multiple nutrients important for human health. Enhancing the thickness of the aleurone layer through breeding could improve the nutritional value of rice. In this study, we characterized OsABCB24, a member of the ABCB transporter gene subfamily in rice, and its role in regulating aleurone development. Expression profiling revealed that OsABCB24 is predominantly expressed in seedling leaves and developing caryopsis, particularly in aleurone layer cells during grain filling. Subcellular localization analyses via protoplast transfection and immunogold labeling demonstrated that OsABCB24 is localized to the chloroplast. Knockout of OsABCB24 significantly increased the thickness of the aleurone cells and elevated the concentrations of minerals such as phosphorus, potassium, zinc, magnesium, and copper in brown rice. Knockout of OsABCB24 also decreased the concentrations of free and conjugated indole-3-acetic acid (IAA) in developing caryopsis and increased the leaf angle by influencing cell proliferation and elongation on the adaxial side of the lamina joint at the seedling stage. Leaf angle was less sensitive to exogenous IAA in osabcb24 mutants than in the wild type. Taken together, these findings suggest that OsABCB24 is a negative regulator of aleurone cell expansion possibly by modulating auxin homeostasis. OsABCB24 is a promising genetic target for breeding rice with increased aleurone thickness and nutrient concentrations without yield penalty.

谷物糊粉是富含多种营养物质的外细胞层,对人体健康具有重要意义。通过选育提高糊粉层厚度可以提高水稻的营养价值。在这项研究中,我们对水稻ABCB转运亚家族成员OsABCB24及其在调节糊粉发育中的作用进行了研究。表达谱分析显示,OsABCB24主要在幼苗叶片和颖果发育中表达,特别是在灌浆过程中的糊粉层细胞中表达。通过原生质体转染和免疫金标记的亚细胞定位分析表明,OsABCB24定位于叶绿体。敲除OsABCB24显著增加了糊粉细胞的厚度,提高了糙米中磷、钾、锌、镁和铜等矿物质的浓度。敲除OsABCB24还降低了发育中的颖果中游离和共轭吲哚-3-乙酸(IAA)的浓度,并通过影响幼苗期叶节近轴侧的细胞增殖和伸长来增加叶片角度。与野生型相比,osabcb24突变体叶片角对外源IAA的敏感性较低。综上所述,这些发现表明OsABCB24可能通过调节生长素的稳态来负调节糊粉细胞的增殖。OsABCB24是一个很有前途的遗传靶点,可以在不影响产量的情况下增加糊粉厚度和营养浓度。
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引用次数: 0
Vascular network in the pericarp of tomato fruit and implications for fruit size, quality, and drought response. 番茄果实果皮维管网络及其对果实大小、品质和干旱响应的影响。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf503
Xuemin Hou, Hao Li, Nadia Bertin, Tim J Brodribb, Taisheng Du

The importance of the vascular network for transporting water, carbohydrates, and nutrients for sustaining plant growth and development in the vegetative body of plants is well known. Nevertheless, the vascular network within a fruit is still inadequately understood. Here, we characterized the vascular network in the fruit pericarp of 10 tomato genotypes varying in fruit size from 20 to 287 g (fresh mass) and investigated its relationships with typical hydraulic and anatomical traits under well-watered and water deficit conditions. We found that larger fruits had lower vein length density, accompanied by a larger number of xylem vessels within a vascular bundle and lower water uptake capacity per fresh mass. Vein length density was positively correlated with total soluble solids, while negatively correlated with mesocarp cell size. This study highlights the association between the hydraulic function of the fruit peripheral vascular network and fruit size, likely opening up a new research avenue for understanding fruit evolution, aiding in the selection of drought-tolerant genotypes, and encouraging the integration of fruit venation patterns into research.

在植物营养体中,维管网络运输水、碳水化合物和营养物质对维持植物生长发育的重要性是众所周知的。然而,水果内部的维管网仍未被充分了解。本研究对果实大小从20 ~ 287 g不等的10个番茄基因型果皮维管网络进行了表征,并研究了其在水分充足和缺水条件下与典型水力和解剖性状的关系。结果表明,果实越大,叶脉长度密度(VLD)越低,维管束内木质部导管数量越多,每鲜质量的吸水能力越低。VLD与可溶性固形物总量呈正相关,与中果皮细胞大小负相关。该研究强调了果实周围维管网络的水力功能与果实大小之间的关系,可能为理解果实进化开辟了新的研究途径,有助于耐旱基因型的选择,并鼓励将果实脉理模式整合到研究中。
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引用次数: 0
Coordinating nutrient supply and flowering time for sustainable agriculture. 协调营养供应和开花时间,实现可持续农业。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf492
Gibeom Baek, Jinmi Yoon, Na-Hyun Shin, Janghyun Choi, Young-Joon Park, Joong Hyoun Chin, Lae-Hyeon Cho

The transition from vegetative to reproductive growth is a critical phase in the life cycle of a plant, directly affecting fecundity and overall crop productivity. This phase change is regulated by both endogenous genetic programs and environmental cues, including photoperiod, ambient temperature, abiotic stress, and nutrient availability. Among essential macronutrients, nitrogen (N), phosphorus (P), and potassium (K) support fundamental plant growth processes and actively regulate flowering time through distinct physiological and molecular mechanisms. Many studies have shown that both deficiency and excess of N, P, or K can either accelerate or delay flowering, depending on the species, developmental stage, and environmental context. In this review, we summarize the current knowledge on how N, P, and K affect flowering time in various plant species, including model and crop plants. We highlight the nutrient-responsive regulatory pathways and key genes involved in floral transition. By integrating recent findings in molecular genetics, physiology, and agronomy, we provide insights into how precise nutrient management can optimize flowering schedules, improve yield stability, and reduce fertilizer dependency. These insights, along with understanding macronutrient use efficiency, are essential for developing sustainable agricultural strategies that can adapt to changing environmental conditions, while ensuring food security and productivity.

从营养生长到生殖生长的过渡是植物生命周期的关键阶段,直接影响生殖成功和作物的整体生产力。这一阶段的变化受到内源性遗传程序和环境因素的调节,包括光周期、环境温度、非生物胁迫和营养可利用性。在必需常量营养素中,氮(N)、磷(P)和钾(K)支持植物的基本生长过程,并通过不同的生理和分子机制积极调节开花时间。许多研究表明,氮、磷或钾的缺乏和过量都可以根据物种、发育阶段和环境背景加速或延迟开花。本文综述了氮、磷、钾对不同植物(包括模式植物和作物植物)开花时间的影响。我们强调了营养响应调控途径和关键基因参与花过渡。通过整合分子遗传学、生理学和农学的最新研究成果,本文综述了精确的营养管理如何优化开花时间表、提高产量稳定性和减少对肥料的依赖。这些见解以及对宏量营养素利用效率的理解,对于制定可持续农业战略至关重要,这些战略既能适应不断变化的环境条件,又能确保粮食安全和生产力。
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引用次数: 0
When 1-2 °C matters: climate warming reshapes maize disease and resistance networks. 当1-2°C重要时:气候变暖重塑玉米疾病和抗性网络。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf495
Huan Jia, Enping Cai, Weilun Xu, Changqing Chang
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引用次数: 0
A spontaneous mutation in a key C4 pathway gene significantly alters leaf δ13C, uncoupling its relationship with water use efficiency and photosynthetic performance in Zea mays. 玉米C4通路关键基因的一个自发突变显著改变了叶片δ13C,解除了其与水分利用效率和光合性能的耦合关系。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf436
Robert J Twohey, Joseph D Crawford, Matthew J Runyon, Jiayang Xie, Andrew D B Leakey, Asaph B Cousins, Anthony J Studer

Increases in global temperature and drought are negatively impacting the yields of major crops. Therefore, targeted improvements to intrinsic water use efficiency (WUEi) are needed to reduce the water required for agricultural production. While it is very time-consuming to directly measure WUEi, stable carbon isotope ratios (δ13C) are a reliable high throughput proxy trait for quantifying WUEi in C3 species. While genetic studies have improved our understanding of the relationship between WUEi and δ13C in C4 species, the knowledge needed to implement δ13C in breeding schemes is incomplete. Using a maize line with an extremely negative δ13C value, a quantitative genetics approach was used to identify a large deletion in carbonic anhydrase1 (cah1). Carbonic anhydrase is the first enzymatic step of the C4 photosynthetic pathway and is known to affect δ13C. Surprisingly, the line with the mutant allele had significantly higher carbonic anhydrase activity with a concurrent reduction in δ13C, the opposite of what would be expected based on C4 carbon isotope fractionation theory. These observations decouple δ13C and WUEi, which calls for further investigation into carbon isotope discrimination in C4 species.

全球气温上升和干旱对主要作物的产量产生了负面影响。因此,需要有针对性地提高内在水利用效率(WUEi),以减少农业生产所需的水。虽然直接测量WUEi非常耗时,但稳定碳同位素(δ13C)是定量C3种WUEi的可靠的高通量代理性状。虽然遗传学研究提高了我们对C4物种WUEi与δ13C之间关系的认识,但在育种方案中实施δ13C所需的知识尚不完整。利用δ13C值极负的玉米品系,利用定量遗传学方法鉴定了碳酸酐酶1 (cah1)的一个大缺失。碳酸酐酶是C4光合途径的第一个酶促步骤,已知影响δ13C。令人惊讶的是,具有突变等位基因的系具有显著更高的碳酸酐酶活性,同时δ13C降低,这与基于C4碳同位素分馏理论的预期相反。这些观测结果解耦了δ13C和WUEi,这需要进一步研究C4物种的碳同位素区分。
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引用次数: 0
Salicylic acid suppresses 1O2-mediated susceptibility to Alternaria alternata in Arabidopsis. 水杨酸抑制拟南芥对02介导的交替稻瘟病菌的敏感性。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf432
Yanjing Guo, Jiale Shi, Xia Wang-Zhu, Liru Mi, He Wang, Min Chen, Dan Cheng, Hongyu Ma, Bernal E Valverde, Yujing Liu, Matthew J Terry, Shiguo Chen

Necrotrophic Alternaria alternata induces EXECUTER 1(EX1)/2-dependent singlet oxygen (1O2) bursts, leading to plant cell death, with jasmonic acid (JA) acting as a key signal transducer downstream of EX1/2-mediated signaling. Salicylic acid (SA), a crucial defense hormone, is known to respond to pathogen invasion and activate defense gene expression. Previous studies emphasized the importance of SA in A. alternata-induced necrosis in the light of the increased susceptibility of SA-deficient transgenic Arabidopsis NahG to A. alternata. In this study, we investigated the role of SA in A. alternata-triggered 1O2 signaling in Arabidopsis. We found that EX1/2 deficiency did not alter SA levels in Arabidopsis infected with A. alternata, indicating that SA signaling regulates A. alternata-induced pathogenesis through an EX1/2-independent pathway. Exogenous SA application and increased endogenous SA in the ssi2-2 mutant enhanced resistance but inhibited JA production. Conversely, SA signaling deficiency in the eds1 and pad4 mutants increased susceptibility and elevated JA levels. In conclusion, SA enhances Arabidopsis defense against A. alternata via an EX1/2-independent 1O2 signal pathway and antagonizes JA biosynthesis.

坏死性alternnaria alternata诱导EXECUTER 1(EX1)/2依赖性单线态氧(1O2)爆发,导致植物细胞死亡,茉莉酸(JA)作为EX1/2介导的信号传导下游的关键信号换能器。水杨酸(Salicylic acid, SA)是一种重要的防御激素,可以对病原体的入侵做出反应,激活防御基因的表达。先前的研究强调SA在a.m athata诱导的坏死中的重要性,因为缺乏SA的转基因拟南芥NahG对a.m athata的敏感性增加。在本研究中,我们研究了SA在a.a alternata介导的拟南芥1O2信号通路中的作用。我们发现EX1/2缺乏并没有改变南芥中SA的水平,这表明SA信号通过一个独立于EX1/2的途径调节南芥诱导的发病机制。在ssi2-2突变体中,外源SA的施用和内源SA的增加增强了抗性,但抑制了JA的产生。相反,eds1和pad4突变体的SA信号缺陷增加了易感性和JA水平的升高。综上所述,SA通过不依赖于ex1 /2的1O2信号通路增强拟南芥对南芥的防御能力,并抑制JA的生物合成。
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引用次数: 0
Plant heat shock protein Hsp90 enhances stress resistance through integrating protein quality control, chloroplast protection, hormone signal network, and immune defense. 植物热休克蛋白Hsp90通过整合蛋白质量控制、叶绿体保护、激素信号网络和免疫防御等功能增强抗逆性。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf447
Jieting Wu, Yuxin Li, Haoran Yin, Lei Zhao, Chengbin Xu, Xiaofan Fu, Jing Shang, Shuhan Liu, Haijuan Guo, Fang Ma

There has been groundbreaking progress in identifying unique functions of the plant heat shock protein Hsp90 in stress responses in recent years. However, there is an absence of systematic integration of these new mechanisms in protein quality control, hormone network regulation, chloroplast protection, and immune defense in existing reviews; this article aims to fill this gap. Recent studies have revealed four key mechanisms: (i) Hsp90 forms complexes with E3 ligases to promote polyubiquitination of heat-induced protein aggregates, cooperating with the 26S proteasome for clearance, a pathway hijacked by viruses; (ii) Hsp90 stabilizes the auxin receptor Transport inhibitor response 1 (TIR1), reconstructs root auxin gradients via polarized PIN-FORMED 1 (PIN1), activates abscisic acid (ABA) biosynthesis, and enhances insect resistance through JA signaling; (iii) Hsp90C maintains photosystem renewal, protects chloroplast DNA via CHLOROPLAST-AND-NUCLEUS DUAL-LOCALIZED PROTEIN 1 (CND1) translocation, and stabilizes thylakoid proteins via its CTE domain; and (iv) Hsp90 escorts Chitin Elicitor Receptor Kinase 1 (CERK1) to initiate pattern-triggered immunity (PTI), activates nucleotide binding leucine-rich repeat (NLR) for effector-triggered immunity (ETI), and interacts with Autophagy-related protein 8 (ATG8) to enhance autophagic pathogen clearance. This review integrates key new discoveries since 2012 and identifies core research gaps to address: regulation of optimal threshold of Hsp90 abundance, its combined stress response mechanism, transformation of knowledge from model plants to major food crops. The article provides a clear direction framework for subsequent research.

鉴于近年来对植物Hsp90在逆境应答中的独特功能的研究取得了突破性进展,而现有文献对其在蛋白质质量控制、激素网络调节、叶绿体保护和免疫防御等方面的新机制缺乏系统整合,本文旨在填补这一空白。最近的研究揭示了四个关键机制:(1)Hsp90与E3连接酶形成复合物,促进热诱导蛋白聚集体的多泛素化,与26S蛋白酶体合作清除病毒劫持的途径;(2) Hsp90稳定生长素受体TIR1,通过极化PIN1重建根生长素梯度,激活ABA生物合成,通过JA信号增强抗虫能力;(3) Hsp90C维持光系统更新,通过CND1易位保护叶绿体DNA,并通过CTE结构域稳定类囊体蛋白;(4) Hsp90陪同CERK1启动PTI,激活ETI的nlr,并与ATG8相互作用增强自噬病原体清除。本文综述了2012年以来的重要新发现,明确了Hsp90丰度调控“最优阈值”及其联合胁迫响应机制、模式植物向主要粮食作物知识转化等亟待解决的核心研究空白,为后续研究提供了明确的方向框架。
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引用次数: 0
Proteomic responses under differing pH and pCO2 levels in the diatom Thalassiosira pseudonana are consistent with a hybrid carbon-concentrating mechanism. 在不同的pH和pCO2水平下,假海藻的蛋白质组学响应与混合碳浓缩机制一致。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf450
Anthony R Himes, Adam B Kustka

The effects of ongoing anthropogenic climate change are not well known in marine diatoms, a key group of primary producers. Specifically, detailed characterizations of their carbon-concentrating mechanisms (CCMs) are lacking, which limits the understanding of how changing ocean carbonate chemistry will impact global primary production. While the model diatom Thalassiosira pseudonana has been widely studied, contrasting results have prevented the clear elucidation of its CCM. A quantitative proteomic analysis was therefore performed across three experimental treatments (low pCO2/high pH, high pCO2/low pH, low pCO2/low pH) to discern the specific roles of proteins that can be involved in both CCMs and other cellular processes (e.g. pH regulation). The results suggest a hybrid CCM consisting of both biophysical and biochemical steps that facilitate increased CO2 diffusion into the cell, the formation and transport of an organic carbon intermediate into the chloroplast, the subsequent decarboxylation of this intermediate, and the facilitated diffusion of inorganic carbon into the pyrenoid-penetrating thylakoid. No evidence supporting roles for candidate CCM proteins in pH regulation, cyclic electron transport, or excess energy dissipation was found. As each CCM step still requires functional validation, common challenges inherent to CCM research are discussed and strategies to overcome them are suggested.

目前尚不清楚人为气候变化对海洋硅藻的影响,而海洋硅藻是主要的初级生产者。具体来说,缺乏对其碳浓缩机制(CCM)的详细描述,这限制了对海洋碳酸盐化学变化如何影响全球初级生产的理解。虽然模型硅藻假海藻已被广泛研究,但对比结果阻碍了其CCM的明确阐明。因此,通过三种实验处理(低pCO2/高pH值,高pCO2/低pH值,低pCO2/低pH值)进行定量蛋白质组学分析,以识别可参与CCMs和其他细胞过程(例如pH调节)的蛋白质的特定作用。结果表明,混合CCM包括生物物理和生化步骤,促进二氧化碳扩散到细胞中,有机碳中间体的形成和运输到叶绿体中,随后该中间体的脱羧,以及促进无机碳扩散到穿透类囊体的类芘中。没有证据支持候选CCM蛋白在pH调节、循环电子传递或过量能量耗散方面的作用。由于每个CCM步骤仍然需要功能验证,因此讨论了CCM研究中固有的常见挑战,并提出了克服这些挑战的策略。
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引用次数: 0
Reduced resource competition from the stem when brassinosteroid biosynthesis is inhibited enhances curd yield in cauliflower. 当油菜素内酯生物合成受到抑制时,茎部资源竞争减少,可提高花椰菜凝乳产量。
IF 5.7 2区 生物学 Q1 PLANT SCIENCES Pub Date : 2026-02-12 DOI: 10.1093/jxb/eraf465
Yuxiang Hu, Qiaomei Ma, Xiequan Ye, Yumiao Xiao, Xintong Song, Jiamiao Wu, Zhenqing Zhao

Stems play diverse roles across different plant species and developmental stages. In cauliflower, both stem growth and resource allocation to the curd remain under-investigated, so in this study we examined stem and curd growth dynamics to identify potential connections between these processes. We found that the stem dry weight and length increased from budding to the stage of commercial maturity, whilst stem dry matter accumulation during this period was negatively correlated with stem length at budding and also with curd yield, implying that the stem acts as a sink organ and potentially competes with the curd. Module trait analysis of transcriptomic data revealed a strong correlation between brassinosteroid (BR)-related pathways and stem length and sink capacity. Treatment of seedlings and plants at the rapid elongation stage with the BR biosynthesis inhibitor propiconazole (PCZ) reduced stem dry matter accumulation and length, confirming that BR positively regulates these traits. Notably, treatment with 1000 μM PCZ increased curd yields in field-grown cauliflower and broccoli, and was associated with higher sucrose, cellulose, and dry matter accumulation in the curds, and enhanced the harvest index. Thus, our study shows that cauliflower yield can be increased by optimizing resource distribution between the stem and curd.

茎在不同的植物种类和发育阶段起着不同的作用。然而,在花椰菜中,茎的生长和凝乳的资源分配仍未得到充分的研究。为了确定这些过程之间的潜在联系,分析了花椰菜茎和凝乳的生长动态。结果表明:出芽至商品成熟期茎干重和茎干长呈增加趋势,而出芽至商品成熟期茎干物质积累量与出芽期茎长呈负相关,且与凝乳产量呈负相关。这意味着茎作为一个吸收器官,潜在地与凝乳争夺资源。转录组学数据的模块性状分析显示,油菜素内酯(BR)相关途径与茎库容量和长度有很强的相关性。本研究采用BR生物合成抑制剂丙环康唑(propiconazole, PCZ)处理花椰菜幼苗和快速伸长期植株,探讨BR是否能调控资源分配。伸长期PCZ处理降低了茎干物质积累和茎长,说明BR对这些性状有正向调节作用。值得注意的是,1000 μM PCZ处理提高了菜花和西兰花的凝乳产量。PCZ处理与凝乳中较高的蔗糖、纤维素和干物质积累有关,这反过来又提高了凝乳产量和收获指数。因此,我们的研究表明,通过优化花椰菜茎和凝块之间的资源分配,可以提高花椰菜的产量。
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引用次数: 0
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