Effects of 1-aminocyclopropane-1-carboxylate and paclobutrazol on the endogenous hormones of two contrasting rice varieties under submergence stress

Wu, Hui; Chen, Huizhe; Zhang, Yikai; Zhang, Yuping; Zhu, Dan; Xiang, Jing

doi:10.1007/s10725-018-0457-6

Cited by 23 publications

(13 citation statements)

References 69 publications

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“…Nevertheless, the content of both GA and ABA increased in maize ear under heat stress, although they are antagonistic hormones (Yang et al, 2017). In addition, a similar GA and ABA increase under temperature or water stress has been described in wheat, rice and Arabidopsis (Van et al, 2009;Yang et al, 2014;Wu H. et al, 2019). Therefore, a set of complex physiological reaction mechanisms must exist, which we will take exploring them as the focus of our further research.…”

Section: Discussionmentioning

confidence: 74%

Endogenous Hormones Inhibit Differentiation of Young Ears in Maize (Zea mays L.) Under Heat Stress

et al. 2020

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Global warming frequently leads to extreme temperatures, which pose a serious threat to the growth, development, and yield formation of crops such as maize. This study aimed to deeply explore the molecular mechanisms of young ear development under heat stress. We selected the heat-tolerant maize variety Zhengdan 958 (T) and heatsensitive maize variety Xianyu 335 (S), and subjected them to heat stress in the V9 (9th leaf), V12 (12th leaf), and VT (tasseling) growth stages. We combined analysis of the maize phenotype with omics technology and physiological indicators to compare the differences in young ear morphology, total number of florets, floret fertilization rate, grain abortion rate, number of grains, and main metabolic pathways between plants subjected to heat stress and those left to develop normally. The results showed that after heat stress, the length and diameter of young ears, total number of florets, floret fertilization rate, and number of grains all decreased significantly, whereas the length of the undeveloped part at the top of the ear and grain abortion rate increased significantly. In addition, the differentially expressed genes (DEGs) in young ears were significantly enriched in the hormone signaling pathways. The endogenous hormone content in young ears exhibited different changes: zeatin (ZT) and zeatin riboside (ZR) decreased significantly, but gibberellin acid 3 (GA 3), gibberellin acid 4 (GA 4), and abscisic acid (ABA) increased significantly, in ears subjected to heat stress. In the heat-tolerant maize variety, the salicylic acid (SA), and jasmonic acid (JA) content in the vegetative growth stage also increased in ears subjected to heat stress, whereas the opposite effect was observed for the heat-sensitive variety. The changes in endogenous hormone content of young ears that were subjected to heat stress significantly affected ear development, resulting in a reduction in the number of differentiated florets, fertilized florets and grains, which ultimately reduced the maize yield.

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Section: Discussionmentioning

confidence: 74%

Endogenous Hormones Inhibit Differentiation of Young Ears in Maize (Zea mays L.) Under Heat Stress

et al. 2020

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“…The plant changes the balance of synthesis and transport of plant hormones and regulates the response to waterlogging via complex signaling. Plant hormones, as important endogenous signals, play a central role in the mechanism of waterlogging tolerance ( Benschop et al, 2006 ; Wu et al, 2019 ; Yamauchi et al, 2020 ). Some selected recent studies on phytohormones and plant growth regulator–mediated waterlogging tolerance in plants are presented in Table 1 .…”

Section: Waterlogging Stress Mediated By Plant Hormonesmentioning

confidence: 99%

Mechanisms of Waterlogging Tolerance in Plants: Research Progress and Prospects

et al. 2021

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Waterlogging is one of the main abiotic stresses suffered by plants. Inhibition of aerobic respiration during waterlogging limits energy metabolism and restricts growth and a wide range of developmental processes, from seed germination to vegetative growth and further reproductive growth. Plants respond to waterlogging stress by regulating their morphological structure, energy metabolism, endogenous hormone biosynthesis, and signaling processes. In this updated review, we systematically summarize the changes in morphological structure, photosynthesis, respiration, reactive oxygen species damage, plant hormone synthesis, and signaling cascades after plants were subjected to waterlogging stress. Finally, we propose future challenges and research directions in this field.

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“…This may be possible due to dynamic phytohormone levels and an unconstant inhibitory effect of paclobutrazol on spike differentiation. The mutual antagonism and interactions between those hormones varied in different growth stages of crops ( Wu et al, 2019 ). Additionally, IAA, CTK, and GA contents in spikes were lower or not different under nitrogen topdressing with or without paclobutrazol at the jointing stage compared with the pseudostem erection stage.…”

Section: Discussionmentioning

confidence: 99%

Effects of nitrogen topdressing and paclobutrazol at different stages on spike differentiation and yield of winter wheat

Batchelor

et al. 2021

PeerJ

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Background Optimal nitrogen (N) application and plant growth regulators can improve wheat productivity. This can help to improve yield level and ensure food security with limited resources in the Huang-Huai-Hai Plain of China (HPC). Methods A 2-year field experiment was conducted using a randomized block design with four treatments (TS-N topdressing at pseudostem erection stage ; TPS-N topdressing combined with paclobutrazol application at pseudostem erection stage; TJ-N topdressing at jointing stage; TPJ-N topdressing at combined with paclobutrazol application at jointing stage) in 2011–2013. Results The grain number per ear, thousand kernel weight and yield for the TJ and TPJ treatments were higher than those of the TS and TPS treatments. Grain number per ear, yield, and thousands kernel weigh for the TPJ treatment were significantly higher than for the TS and TPS in 2011–2012 (9.82% and 7.27%, 10.23% and 8.99%, 6.12% and 5.58%) and in 2012–2013 (10.21% and 11.55%, 8.00% and 6.58%, 0.00 and 0.00), respectively. Thousands kernel weight under TJ were significantly higher than those under TS and TPS by 13.21% and 14.03%, respectively in 2012–2013. The floret number, significantly correlated with cytokinin content, was also significantly increased under TJ and TPJ at connectivum differentiation stage. For TPJ treatment, the floret number was significantly higher than for the TS, TPS, and TJ by 19.92%, 10.21%, 6.10% in 2011–2012; it was higher than for the TS and TPS by 28.06% and 29.61% in 2012–2013, respectively. The relative expression level of cytokinin oxidase/dehydrogenase gene (TaCKX2.2) was improved during flowering, when cytokinin content was at high level and was also inhibited by paclobutrazol with different degrees. Conclusions Therefore, nitrogen topdressing at jointing stage had increased grain number per ear, thousand kernel weight, and grain yield of wheat. Paclobutrazol could delay spike differentiation and promote cytokinin accumulation that induced expression of TaCKX2.2, maintaining hormonal balance and affecting wheat spike morphogenesis.

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Effects of 1-aminocyclopropane-1-carboxylate and paclobutrazol on the endogenous hormones of two contrasting rice varieties under submergence stress

Cited by 23 publications

References 69 publications

Endogenous Hormones Inhibit Differentiation of Young Ears in Maize (Zea mays L.) Under Heat Stress

Endogenous Hormones Inhibit Differentiation of Young Ears in Maize (Zea mays L.) Under Heat Stress

Mechanisms of Waterlogging Tolerance in Plants: Research Progress and Prospects

Effects of nitrogen topdressing and paclobutrazol at different stages on spike differentiation and yield of winter wheat

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