Current Studies of the Effects of Drought Stress on Root Exudates and Rhizosphere Microbiomes of Crop Plant Species

Chen, Yalin; Yao, Zongmu; Sun, Yu; Wang, Enze; Tian, Chunjie; Sun, Yang; Liu, Juan; Sun, Chuang; Tian, Lei

doi:10.3390/ijms23042374

Cited by 42 publications

(16 citation statements)

References 80 publications

(105 reference statements)

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“…The physicochemical properties of soil affect the growth and development of plants . Plants improve the physicochemical properties of soil through the rhizosphere (Chen et al, 2022) and litter decomposition (Jiang et al, 2020), both of which affect each other through various feedbacks. The rhizosphere/litter decompositioninfluence mechanism is more obvious in arid regions (Mora & Lazaro.…”

Section: Introductionmentioning

confidence: 99%

Fertile Island Effect by Three Typical Woody Plants on Wetlands of Ebinur Lake, northwestern China

Zhang

Wang

Cai

et al. 2022

Front. Environ. Sci.

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Desertification poses a permanent threat to the security of arid ecosystems. Perennial arid vegetation plays a crucial role in maintaining the structure and function of arid ecosystems and slowing the process of desertification by forming “fertile islands” under the tree canopy. However, the process of formation and development of these fertile islands remains uncertain. Here, we explored how three typical woody plants (i.e., Populus euphratica, Haloxylon ammodendron, and Nitraria tangutorum) in the Ebinur Lake Basin of northwestern China differed in their soil nitrogen and phosphorus. 1) Significant differences of organic carbon and total and available nitrogen/phosphorus were observed in the soil among the three typical woody plant-dominated ecosystems. Populus euphratica had significant differences of N and P contents between the canopy and bare soils, except for ammonium nitrogen. 2) Our RDA analysis revealed that the major factors that influenced the soil nutrient differences among the three vegetations were plant crown width, soil water content, salinity, and pH. 3) The organic carbon content of bare soil was significantly correlated with N and P in all the three vegetations. This study contributes to our understanding of the factors that influence the fertilizer island effect in arid ecosystems, which may contribute to soil conservation in arid areas.

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Section: Introductionmentioning

confidence: 99%

Fertile Island Effect by Three Typical Woody Plants on Wetlands of Ebinur Lake, northwestern China

Zhang

Wang

Cai

et al. 2022

Front. Environ. Sci.

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“…Under drought stress, the biodiversity in soil decreased significantly but increased in the rhizosphere community [ 289 ]. The ratio of fungi to bacteria is an important index for measuring the microbial community structure.…”

Section: Open Questionsmentioning

confidence: 99%

“…Under drought stress, the root-associated fungal community changes, and this, again, is dependent on the genotype, as shown for rice (cf. [ 289 ], and the references therein). Fungi that help to improve the drought tolerance of rice also change their secretome patterns under drought.…”

Section: Open Questionsmentioning

confidence: 99%

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Is Endophytic Colonization of Host Plants a Method of Alleviating Drought Stress? Conceptualizing the Hidden World of Endophytes

Byregowda

Prasad

Oelmüller

et al. 2022

IJMS

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In the wake of changing climatic conditions, plants are frequently exposed to a wide range of biotic and abiotic stresses at various stages of their development, all of which negatively affect their growth, development, and productivity. Drought is one of the most devastating abiotic stresses for most cultivated crops, particularly in arid and semiarid environments. Conventional breeding and biotechnological approaches are used to generate drought-tolerant crop plants. However, these techniques are costly and time-consuming. Plant-colonizing microbes, notably, endophytic fungi, have received increasing attention in recent years since they can boost plant growth and yield and can strengthen plant responses to abiotic stress. In this review, we describe these microorganisms and their relationship with host plants, summarize the current knowledge on how they “reprogram” the plants to promote their growth, productivity, and drought tolerance, and explain why they are promising agents in modern agriculture.

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“…Drought stress alters not only the amount but also the composition of root exudates (Chen et al., 2022). This may improve the contact of the root movement through and the nutrient uptake from the soil (Gargallo‐Garriga et al., 2018).…”

Section: Introductionmentioning

confidence: 99%

Local and systemic metabolic adjustments to drought in maize: Hydraulic redistribution in a split‐root system

Werner

Hartwig

Engel

et al. 2022

J. Plant Nutr. Soil Sci.

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Background:It is yet unknown how maize plants respond to a partial root drying under conditions of a limited total water supply, and which adaptation mechanisms are triggered under these conditions. Aims:The aims of this study were to assess whether partial root drying results in distinguishable local and systemic physiological and metabolic drought responses, and whether compensatory water uptake and/or alteration of root architecture occurs under these conditions.Methods: Maize plants were grown in a split-root system. When plants were 20 days old, the treatments 'well-watered' , 'local drought' and 'full drought' were established for a period of 10 days. Shoot length and gas exchange were measured non-destructively, root exudates were collected using a filter system and biomass, relative water content, osmolality and proline content were determined destructively at final harvest. Results:Local drought triggered stress responses such as reduced biomass, shoot length, relative water content and increased osmolality. Maintained root growth was systemically achieved by hydraulic redistribution rather than by altering root architecture. Local and systemic osmolyte adjustments contributed to this hydraulic redistribution. Conclusions:Both local and systemic metabolic responses helped the plants to induce hydraulic redistribution, enhance water availability and in consequence plant water relations. This resulted in a surprisingly well-maintained root growth even in the drought stressed root compartment.

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Current Studies of the Effects of Drought Stress on Root Exudates and Rhizosphere Microbiomes of Crop Plant Species

Cited by 42 publications

References 80 publications

Fertile Island Effect by Three Typical Woody Plants on Wetlands of Ebinur Lake, northwestern China

Fertile Island Effect by Three Typical Woody Plants on Wetlands of Ebinur Lake, northwestern China

Is Endophytic Colonization of Host Plants a Method of Alleviating Drought Stress? Conceptualizing the Hidden World of Endophytes

Local and systemic metabolic adjustments to drought in maize: Hydraulic redistribution in a split‐root system

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