Aquaporins: A potential weapon in plants for abiotic stress tolerance

Hussain, Saddam; Ashraf, Umair; Ali, Muhammad Fraz; Zulfiqar, Usman; Khaliq, Abdul

doi:10.1016/b978-0-12-817958-1.00005-0

Cited by 4 publications

(4 citation statements)

References 79 publications

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“…Several studies have claimed that aquaporins play an important role in improving salt tolerance (Hussain et al, 2021; Munir et al, 2022; Rios et al, 2017;, Zhao et al, 2021). In general, the expression of AQP genes decreased during salinity stress as a defence mechanism to protect the cells from water loss (Aroca et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Due to their ability to transport small uncharged solutes, including mineral elements, aquaporins play an important role in the absorption and transport of nutrients in the plant (Chaumont & Tyerman, 2014; Wang et al, 2016). Therefore, as a result of this dual function, under stress conditions such as salinity or excess of Zn, aquaporins can not only optimize the water flow through membranes when it is considerably limited (Hussain et al, 2021; Kapilan et al, 2018; Zhao et al, 2021), but can also directly or indirectly contribute to the retention of Na or Zn ions in vacuoles to alleviate their toxic effects in the plant (Mansour, 2022; Wang et al, 2022a). However, not all aquaporins act in the same way under these conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Aquaporins are involved in water relations in plants and, therefore, play a very important role in maintaining water balance (Hussain et al, 2021; Kapilan et al, 2018; Pawlowicz & Masajada, 2019). These are small selective membrane channels that are highly conserved through evolution and are involved in the specific transport of water, small solutes and ions.…”

Section: Introductionmentioning

confidence: 99%

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The differential expressions of aquaporins underline the diverse strategies of cucumber and tomato against salinity and zinc stress

Martinez‐Alonso,

Nicolás‐Espinosa,

Carvajal

et al. 2024

Physiologia Plantarum

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Salinity and excess zinc are two main problems that have limited agriculture in recent years. Aquaporins are crucial in regulating the passage of water and solutes through cells and may be essential for mitigating abiotic stresses. In the present study, the adaptive response to moderate salinity (60 mM NaCl) and excess Zn (1 mM ZnSO4) were compared alone and in combination in Cucumis sativus L. and Solanum lycopersicum L. Water relations, gas exchange and the differential expression of all aquaporins were analysed. The results showed that cucumber plants under salinity maintained the internal movement of water through osmotic adjustment and the overexpression of specific PIPs aquaporins, following a “conservation strategy”. As tomato has a high tolerance to salinity, the physiological parameters and the expression of most aquaporins remained unchanged. ZnSO4 was shown to be stressful for both plant species. While cucumber upregulated 7 aquaporin isoforms, the expression of aquaporins increased in a generalized manner in tomato. Despite the differences, water relations and transpiration were adjusted in both plants, allowing the RWC in the shoot to be maintained. The aquaporin regulation in cucumber plants facing NaCl+ZnSO4 stress was similar in the two treatments containing NaCl, evidencing the predominance of salt in stress. However, in tomato, the induced expression of specific isoforms to deal with the combined stress differed from independent stresses. The results clarify the key role of aquaporin regulation in facing abiotic stresses and their possible use as markers of tolerance to salinity and heavy metals in plants.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The differential expressions of aquaporins underline the diverse strategies of cucumber and tomato against salinity and zinc stress

Martinez‐Alonso,

Nicolás‐Espinosa,

Carvajal

et al. 2024

Physiologia Plantarum

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“…Acquiring sufficient amounts of water from the saline soil and keeping a higher shoot water content are essential for plants to maintain photosynthetic capacity and cell growth [16,17]. Aquaporins (AQPs) play a pivotal role in regulating water equilibrium inside and outside of the plant cells and water use efficiency (WUE) by specifically mediating the rapid transport of water across cell membranes [18,19]. Plasma membrane intrinsic proteins (PIPs) and tonoplast intrinsic proteins (TIPs), among the five subfamilies belonging to AQPs, are the most important proteins responsible for water transport because they govern transcellular and intracellular water movement, respectively [20,21], and therefore play vital roles in maintaining the water status of plants grown in saline environments.…”

Section: Introductionmentioning

confidence: 99%

Photosynthesis, Water Status and K+/Na+ Homeostasis of Buchoe dactyloides Responding to Salinity

Guo,

Cui,

et al. 2023

Plants

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Soil salinization is one of the most serious abiotic stresses restricting plant growth. Buffalograss is a C4 perennial turfgrass and forage with an excellent resistance to harsh environments. To clarify the adaptative mechanisms of buffalograss in response to salinity, we investigated the effects of NaCl treatments on photosynthesis, water status and K+/Na+ homeostasis of this species, then analyzed the expression of key genes involved in these processes using the qRT-PCR method. The results showed that NaCl treatments up to 200 mM had no obvious effects on plant growth, photosynthesis and leaf hydrate status, and even substantially stimulated root activity. Furthermore, buffalograss could retain a large amount of Na+ in roots to restrict Na+ overaccumulation in shoots, and increase leaf K+ concentration to maintain a high K+/Na+ ratio under NaCl stresses. After 50 and 200 mM NaCl treatments, the expressions of several genes related to chlorophyll synthesis, photosynthetic electron transport and CO2 assimilation, as well as aquaporin genes (BdPIPs and BdTIPs) were upregulated. Notably, under NaCl treatments, the increased expression of BdSOS1, BdHKT1 and BdNHX1 in roots might have helped Na+ exclusion by root tips, retrieval from xylem sap and accumulation in root cells, respectively; the upregulation of BdHAK5 and BdSKOR in roots likely enhanced K+ uptake and long-distance transport from roots to shoots, respectively. This work finds that buffalograss possesses a strong ability to sustain high photosynthetic capacity, water balance and leaf K+/Na+ homeostasis under salt stress, and lays a foundation for elucidating the molecular mechanism underlying the salt tolerance of buffalograss.

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Plant Biostimulants: Mechanisms and Applications for Enhancing Plant Resilience to Abiotic Stresses

Khalid,

Rasheed,

Asif

et al. 2024

J Soil Sci Plant Nutr

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Aquaporins: A potential weapon in plants for abiotic stress tolerance

Cited by 4 publications

References 79 publications

The differential expressions of aquaporins underline the diverse strategies of cucumber and tomato against salinity and zinc stress

The differential expressions of aquaporins underline the diverse strategies of cucumber and tomato against salinity and zinc stress

Photosynthesis, Water Status and K+/Na+ Homeostasis of Buchoe dactyloides Responding to Salinity

Plant Biostimulants: Mechanisms and Applications for Enhancing Plant Resilience to Abiotic Stresses

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