Kinetin Regulates UV-B-Induced Damage to Growth, Photosystem II Photochemistry, and Nitrogen Metabolism in Tomato Seedlings

Bashri, Gausiya; Singh, Madhulika; Mishra, Rohit Kumar; Kumar, Jitendra; Singh, Vijay Pratap; Prasad, Sheo Mohan

doi:10.1007/s00344-017-9721-7

Cited by 33 publications

(14 citation statements)

References 45 publications

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“…The results confirmed the previously described relation between ARR and COP1 , but also highlighted several novel putative interactions, including a connection between the UV-B receptor UVR8 and the AHP2 component of cytokinin signalling. This is consistent with a recent finding that cytokinin regulates UV-B-induced damage in tomato seedlings [ 156 ].…”

Section: Light Signalling and The Circadian Clock Interact With Cysupporting

confidence: 94%

Cytokinin at the Crossroads of Abiotic Stress Signalling Pathways

Pavlů

Novák

Koukalová

et al. 2018

IJMS

137

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Cytokinin is a multifaceted plant hormone that plays major roles not only in diverse plant growth and development processes, but also stress responses. We summarize knowledge of the roles of its metabolism, transport, and signalling in responses to changes in levels of both macronutrients (nitrogen, phosphorus, potassium, sulphur) and micronutrients (boron, iron, silicon, selenium). We comment on cytokinin’s effects on plants’ xenobiotic resistance, and its interactions with light, temperature, drought, and salinity signals. Further, we have compiled a list of abiotic stress-related genes and demonstrate that their expression patterns overlap with those of cytokinin metabolism and signalling genes.

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Section: Light Signalling and The Circadian Clock Interact With Cysupporting

confidence: 94%

Cytokinin at the Crossroads of Abiotic Stress Signalling Pathways

Pavlů

Novák

Koukalová

et al. 2018

IJMS

137

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“…Nitrate reductase mediates the rate-limiting step in N metabolism, thereby regulating the key metabolic pathways including the amino acid and N-containing secondary metabolites [59]. Bashri et al [60] and Khalil et al [61] have also demonstrated increased nitrate reductase activity due to the application of cadaverine and Kn. Increased nitrate reductase activity results in improved N assimilation [61], thereby influencing the protein synthesis and stress tolerance [62].…”

Section: Discussionmentioning

confidence: 99%

Combined Kinetin and Spermidine Treatments Ameliorate Growth and Photosynthetic Inhibition in Vigna angularis by Up-Regulating Antioxidant and Nitrogen Metabolism under Cadmium Stress

Ahanger

Aziz

Sahli³

et al. 2020

Biomolecules

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Pot experiments were conducted to investigate the probable beneficial role of the individual as well as combined application of kinetin (50 μM Kn) and spermidine (200 μM Spd) on Vigna angularis under cadmium (Cd) stress. Cd treatment reduced growth by declining the content of chlorophylls and carotenoids, photosynthesis, and gas exchange parameters. Exogenously, Kn and Spd application enhanced the photosynthetic parameters and up-regulated the antioxidant system by improving the activities of antioxidant enzymes and the content of non-enzymatic components. In addition, the application of Kn and Spd resulted in significant improvement in the content of sugars, proline, and glycine betaine, ameliorating the decline in relative water content. Oxidative stress parameters including hydrogen peroxide, superoxide, lipid peroxidation, lipoxygenase activity, and electrolyte leakage increased due to Cd stress; however, the application of Kn and Spd imparted a significant decline in all these parameters. Further, reduced Cd uptake was also observed due to Kn and Spd application. Total phenols and flavonoids also increased due to Kn and Spd treatments under normal as well as Cd stress conditions, which may have further helped with the elimination of reactive oxygen species. Reduction in the activity of nitrate reductase and the content of nitrogen was ameliorated due to the exogenous application of Kn and Spd. Therefore, the exogenous application of Kn and Spd benefited Vigna angularis counteracting the damaging effects of Cd stress by up-regulating the tolerance mechanisms, including antioxidant and osmolyte metabolism.

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“…In tomato seedlings exposed to UV-B, external kinetin treatment severely affected the photosynthesis and nitrogen metabolism. Thus, external application or genetic engineering to accumulate higher cytokinin content can be a potential strategy to sustain productivity against environmental stress (Bashri et al 2018). Jasmonic acid (JA) is known for its role in defense against various biotic and abiotic stress factors in addition to its growthregulating properties When a plant experiences UV-B stress, JA pre-treatment could counteract its effect by synthesizing anti-oxidative enzymes and protective pigments, which is confirmed in a variety of crops such as wheat, barley and Kentucky bluegrass (Fedina et al 2009;Liu et al 2012;Quan et al 2018).…”

Section: Figure 3 Continuedmentioning

confidence: 99%

Light signaling and UV‐B‐mediated plant growth regulation

Yadav

Singh

Lingwan

et al. 2020

JIPB

170

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Light plays an important role in plants’ growth and development throughout their life cycle. Plants alter their morphological features in response to light cues of varying intensity and quality. Dedicated photoreceptors help plants to perceive light signals of different wavelengths. Activated photoreceptors stimulate the downstream signaling cascades that lead to extensive gene expression changes responsible for physiological and developmental responses. Proteins such as ELONGATED HYPOCOTYL5 (HY5) and CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) act as important factors which modulate light‐regulated gene expression, especially during seedling development. These factors function as central regulatory intermediates not only in red, far‐red, and blue light pathways but also in the UV‐B signaling pathway. UV‐B radiation makes up only a minor fraction of sunlight, yet it imparts many positive and negative effects on plant growth. Studies on UV‐B perception, signaling, and response in plants has considerably surged in recent times. Plants have developed different strategies to use UV‐B as a developmental cue as well as to withstand high doses of UV‐B radiation. Plants’ responses to UV‐B are an integration of its cross‐talks with both environmental factors and phytohormones. This review outlines the current developments in light signaling with a major focus on UV‐B‐mediated plant growth regulation.

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Kinetin Regulates UV-B-Induced Damage to Growth, Photosystem II Photochemistry, and Nitrogen Metabolism in Tomato Seedlings

Cited by 33 publications

References 45 publications

Cytokinin at the Crossroads of Abiotic Stress Signalling Pathways

Cytokinin at the Crossroads of Abiotic Stress Signalling Pathways

Combined Kinetin and Spermidine Treatments Ameliorate Growth and Photosynthetic Inhibition in Vigna angularis by Up-Regulating Antioxidant and Nitrogen Metabolism under Cadmium Stress

Light signaling and UV‐B‐mediated plant growth regulation

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