Plant Growth Regulators INCYDE and TD-K Underperform in Cereal Field Trials

Voorthuizen, Matthew J van; Song, Jiancheng; Novák, Ondřej; Jameson, Paula E.

doi:10.3390/plants10112309

Cited by 5 publications

(9 citation statements)

References 104 publications

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“…In wheat (Triticum aestivum), early bioassay work suggested a complex of bioactive cytokinins and glucosides with zeatin predominant, e.g., [43][44][45]. Recent comprehensive LC-MS/MS analyses revealed the presence of 20 isoprenoid cytokinins, with a predominance of tZand cZ-type cytokinins and low levels of iP types and DZ types [46,47]. There is only one report of a 7-glucoside (tZ7G) in wheat [48].…”

Section: Cerealsmentioning

confidence: 99%

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Cytokinin Translocation to, and Biosynthesis and Metabolism within, Cereal and Legume Seeds: Looking Back to Inform the Future

Jameson

2023

Metabolites

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Early in the history of cytokinins, it was clear that Zea mays seeds contained not just trans-zeatin, but its nucleosides and nucleotides. Subsequently, both pods and seeds of legumes and cereal grains have been shown to contain a complex of cytokinin forms. Relative to the very high quantities of cytokinin detected in developing seeds, only a limited amount appears to have been translocated from the parent plant. Translocation experiments, and the detection of high levels of endogenous cytokinin in the maternal seed coat tissues of legumes, indicates that cytokinin does not readily cross the maternal/filial boundary, indicating that the filial tissues are autonomous for cytokinin biosynthesis. Within the seed, trans-zeatin plays a key role in sink establishment and it may also contribute to sink strength. The roles, if any, of the other biologically active forms of cytokinin (cis-zeatin, dihydrozeatin and isopentenyladenine) remain to be elucidated. The recent identification of genes coding for the enzyme that leads to the biosynthesis of trans-zeatin in rice (OsCYP735A3 and 4), and the identification of a gene coding for an enzyme (CPN1) that converts trans-zeatin riboside to trans-zeatin in the apoplast, further cements the key role played by trans-zeatin in plants.

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Section: Cerealsmentioning

confidence: 99%

“…In barley (Hordeum vulgare), some 20 isoprenoid cytokinins have been identified in grains, again with the tZand cZ-types predominating [47,53,54].…”

Section: Cerealsmentioning

confidence: 99%

Cytokinin Translocation to, and Biosynthesis and Metabolism within, Cereal and Legume Seeds: Looking Back to Inform the Future

Jameson

2023

Metabolites

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“…It can improve the antioxidant enzyme activity and thus reduce the oxidative stress. Synthetic cytokinins such as Thidiazuron (TDZ) and CPPU N-(2-chloro-4-pyridyl)-N'phenylurea (CPPU), that can activate cytokinin receptors are known to improve chlorophyll b content and can be used as a cotton defoliant (van Voorthuizen et al, 2021).…”

Section: Exogenous Sources Of Cytokininmentioning

confidence: 99%

“…INCYDE is a particularly potent CKX inhibitor among them (Prerostova et al, 2020). INCYDE has been used to improve plant tolerance to abiotic and biotic stresses such as the cadmium challenge in Bulbine natalensis and Rumex crispus as well as the salt challenge in tomato (van Voorthuizen et al, 2021) and Verticillium longisporum (Prerostova et al, 2020). In a recent study, an analog of INCYDE, INCYDE-F was used in the barley field for altering the endogenous cytokinin content (Koprna et al, 2020).…”

Section: Metabolism and Signal Transduction Of Cytokininsmentioning

confidence: 99%

Cytokinin biosynthesis in cyanobacteria: Insights for crop improvement

Uniyal

Bhandari²,

Singh³

et al. 2022

Front. Genet.

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Cytokinins, a type of phytohormones that induce division of cytoplasm, have considerable value in agriculture due to their influences on several physiological processes of plants such as morphogenesis, development of chloroplast, seed dormancy, leaf senescence, etc. Previously, it was assumed that plants obtain cytokinin from the soil produced by microbes as these hormones were first discovered in soil-inhabiting bacteria i.e., Agrobacterium tumefaciens. Later, the cytokinin biosynthesis gene, i.e., ipt gene, has been reported in plants too. Though plants synthesize cytokinins, several studies have reported that the exogenous application of cytokinins has numerous beneficial effects including the acceleration of plant growth and boosting economic yield. Cyanobacteria may be employed in the soil not only as the source of cytokinins but also as the source of other plant growth-promoting metabolites. These organisms biosynthesize the cytokinins using the enzyme isopentenyl transferases (IPTs) in a fashion similar to the plants; however, there are few differences in the biosynthesis mechanism of cytokinins in cyanobacteria and plants. Cytokinins are important for the establishment of interaction between plants and cyanobacteria as evidenced by gene knockout experiments. These hormones are also helpful in alleviating the adverse effects of abiotic stresses on plant development. Cyanobacterial supplements in the field result in the induction of adventitious roots and shoots on petiolar as well as internodal segments. The leaf, root, and stem explants of certain plants exhibited successful regeneration when treated with cyanobacterial extract/cell suspension. These successful regeneration practices mark the way of cyanobacterial deployment in the field as a great move toward the goal of sustainable agriculture.

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“…are elucidated. This group includes articles [1,2,7,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], communications [27,28], and review papers [5,6,11,[29][30][31][32][33][34] with significant results applicable both in science and practice. The biology and ecology of plant secondary metabolites, their identification, and biological and therapeutic activity from different aspects of the phytochemistry of edible, aromatic, medicinal, or potentially medicinal plants are represented in a significant number of articles [3,8,[35][36][37][38][39][40][41][42][43][44][45][46][47][48][49], as well as review papers [9,50,<...…”

mentioning

confidence: 99%