Effects of Salt Stress on Photosynthesis Under Ambient and Elevated Atmospheric CO2 Concentration

Geißler, Nicole; Huchzermeyer, Bernhard; Koyro, Hans‐Werner

doi:10.1007/978-1-4614-6108-1_15

Cited by 5 publications

(3 citation statements)

References 220 publications

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“…That is, Chl b is mainly located in the grana stacks and the light‐harvesting complex, which supplies PSII with energy. Thus, disintegration of the former is probably correlated with a higher Chl a/b ratio, perhaps being an adaptation that prevents an electron surplus in the photosynthetic electron transport chain (Geissler et al ).…”

Section: Discussionmentioning

confidence: 99%

Dopamine alleviates salt‐induced stress in Malus hupehensis

Sun

Chang

et al. 2014

Physiologia Plantarum

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Dopamine mediates many physiological processes in plants. We investigated its role in regulating growth, ion homeostasis and the response to salinity in Malus hupehensis Rehd. Both hydroponics and field-pot experiments were conducted under saline conditions. Salt-stressed plants had reduced growth and a marked decline in their net photosynthetic rates, values for Fv /Fm and chlorophyll contents. However, pretreatment with 100 or 200 μM dopamine significantly alleviated this inhibition and enabled plants to maintain their photosynthetic capacity. In addition to changing stomatal behavior, supplementation with dopamine positively influenced the uptake of K, N, P, S, Cu and Mn ions but had an inhibitory effect on Na and Cl uptake, the balance of which is responsible for managing the response to salinity by Malus plants. Dopamine pretreatment also controlled the burst of hydrogen peroxide, possibly through direct scavenging and by enhancing the activities of antioxidative enzymes and the capacity of the ascorbate-glutathione cycle. We also investigated whether dopamine might regulate salt overly sensitive pathway genes under salinity. Here, MdHKT1, MdNHX1 and MdSOS1 were greatly upregulated in roots and leaves, which possibly contributed to the maintenance of ion homeostasis and, thus, improved salinity resistance in plants exposed earlier to exogenous dopamine. These results support our conclusion that dopamine alleviates salt-induced stress not only at the level of antioxidant defense but also by regulating other mechanisms of ion homeostasis.

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Section: Discussionmentioning

confidence: 99%

Dopamine alleviates salt‐induced stress in Malus hupehensis

Sun

Chang

et al. 2014

Physiologia Plantarum

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“…12,53 Dopamine can reduce the content of Chl b, and in so doing increase the Chl a/b ratio and prevent the accumulation of excess of electrons, which is an adaptive mechanism in the photosynthetic electron transport chain. 54 Studies have shown that exogenous dopamine can increase the degree to which stomata are opened, increasing the length and width of stomata in plants under salt stress. With dopamine treatment, the maximum stomatal openings of Malus were under 100 μM.…”

Section: Salt Stressmentioning

confidence: 99%

Functions of dopamine in plants: a review

Liu

Gao

Liu

et al. 2020

Plant Signaling & Behavior

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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.

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“…These plants exhibit a broad bandwidth of morphological, physiological and biochemical adaptive mechanisms (Koyro et al 2006 ;Huchzermeyer 2011 ;Debez et al 2012 ) and also differ in their response to elevated CO 2 . The quick check is well suited to investigate the reaction of plants to the growth constraints of saline habitats (osmotic stress and restriction of CO 2 uptake; ion toxicity and nutrient imbalance; Geissler et al 2013 ) and to the infl uence of elevated CO 2 on salt resistance. Growth depression under saline conditions can be explained at least for glycophytes such as barley and wheat by a two-phase model (Munns 1993(Munns , 2002 …”

Section: Quick Check System: the Basic Step To Select Suited Cash Cromentioning

confidence: 99%