Effects of dopamine on growth, carbon metabolism, and nitrogen metabolism in cucumber under nitrate stress

Gao

Plant Signaling & Behavior

et al. 2020

Dopamine (3-hydroxytyramine or 3,4-dihydroxyphenethylamine) has many functions in animals, but also shows several other functions in plants. Since the discovery of dopamine in plants in 1968, many studies have provided insight into physiological and biochemical functions, and stress responses of this molecule. In this review, we describe the biosynthesis of dopamine, as well as its role in plant growth and development. In addition, endogenous or exogenously applied dopamine improved the tolerance against several abiotic stresses, such as drought, salt, and nutrient stress. There are also several studies that dopamine contributes to the plant immune response against plant disease. Dopamine affects the expression of many abiotic stresses related genes, which highlights its role as a multi-regulatory molecule and can coordinate many aspects of plant development. Our review emphasized the effects of dopamine against environmental stresses along with future research directions, which will help improve the yield of eco-friendly crops and ensure food security.

Section: Salt Stressmentioning

confidence: 99%

Section: Abiotic and Biotic Stressorsmentioning

confidence: 99%

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Functions of dopamine in plants: a review

Gao

Plant Signaling & Behavior

et al. 2020

“…This is beneficial to the growth of roots. Rubisco, SPS, SS and PEPC are key enzymes in the assimilation and transportation of photosynthate ( Lan et al, 2020 ). Five days after the K supply level changed, Rubisco, SPS, and SS activities in the leaves of seedlings under unstable K treatment were significantly higher than those under K L and K H treatments, but they were still significantly lower than those under the K AC treatment.…”

Section: Discussionmentioning

confidence: 99%

Appropriate and Constant Potassium Supply Promotes the Growth of M9T337 Apple Rootstocks by Regulating Endogenous Hormones and Carbon and Nitrogen Metabolism

Wang

Xing

et al. 2022

Front. Plant Sci.

Potassium (K) is an indispensable nutrient element in the development of fruit trees in terms of yield and quality. It is unclear how a stable or unstable supply of K affects plant growth. We studied the root morphology and physiological and molecular changes in the carbon and nitrogen metabolism of M9T337 apple rootstock under different K levels and supply methods using hydroponics. Five K supply treatments were implemented: continuous low K (KL), initial low and then high K (KLH), appropriate and constant K (KAC), initial high and then low K (KHL), and continuous high K (KH). The results showed that the biomass, root activity, photosynthesis, and carbon and nitrogen metabolism of the M9T337 rootstocks were inhibited under KL, KH, KLH and KHL conditions. The KAC treatment promoted root growth by optimizing endogenous hormone content, enhancing carbon and nitrogen metabolism enzyme activities, improving photosynthesis, optimizing the distribution of carbon and nitrogen, and upregulating the transcription levels of nitrogen assimilation-related genes (nitrate reductase, glutamine synthetase, glutamate synthase, MdNRT1.1, MdNRT1.2, MdNRT1.5, MdNRT2.4). These results suggest that an appropriate and constant K supply ensures the efficient assimilation and utilization of nitrogen and carbon.

“…Moreover, dopamine plays a critical role in response to environmental stimuli including alkali, salt, and drought (Li et al, 2015;Gao et al, 2020;Jiao et al, 2019;Lan, Jiao, Wang, Sun, & Sun, 2020). These resistances to environmental stress are likely due to its antioxidant capacity.…”

Section: The Antioxidant Regulation Of Dopaminementioning

confidence: 99%

Could animal hormone regulate plant development?

Cheng¹,

Wang²,

Yang³

et al. 2020

Preprint

Hormones play a crucial role both in plants and animals. As we all known, hormones work through specific receptors in different organisms. Therefore, the hormone interaction between plant and animal is an interesting question worth discussing. Recently, food safety has become a common topic concerned by consumers. A widely discussed rumor such as "Fruit bulking agent is some human reproductive hormones" leads us to consider whether animal hormones did regulate plant growth. Based on the large amount of previous research, we demonstrated that animal hormones did affect plant, such as steroid hormones for livestock feed could regulate physiological processes in plant including flowering, senescence and stress resistance after excreted into the environment. Here, we summarize the previous studies and systematically discuss the effects of animal hormones on plant growth and development.