Increased Soil Frost Versus Summer Drought as Drivers of Plant Biomass Responses to Reduced Precipitation: Results from a Globally Coordinated Field Experiment

Henry, Hugh A. L.; Abedi, Mehdi; Alados, Concepción L.; Beard, Karen H.; Fraser, Lauchlan H.; Jentsch, Anke; Kreyling, Jüergen; Kulmatiski, Andrew; Lamb, Eric G.; Sun, Wei; Vankoughnett, Mathew R.; Venn, Susanna; Werner, Christiane; Beil, Ilka; Blindow, Irmgard; Dahlke, Sven; Dubbert, Maren; Effinger, Alexandra; Garris, Heath W.; Gartzia, Maite; Gebauer, Tobias; Khan, Mohammed Abu Sayed Arfin; Malyshev, Andrey V.; Morgan, John; Nock, Charles A.; Paulson, Janelle P.; Pueyo, Yolanda; Stover, Holly J.; Yang, Xuechen

doi:10.1007/s10021-018-0231-7

Cited by 20 publications

(11 citation statements)

References 56 publications

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“…Pant biomass decreased significantly in the two cultivars affected by drought stress, similar to the results of previous studies reported for other plant species [ 27 , 28 ]. This effect might be due to decreases in photosynthesis and chlorophyll content [ 29 ].…”

Section: Discussionsupporting

confidence: 91%

Drought stress introduces growth, physiological traits and ecological stoichiometry changes in two contrasting Cunninghamia lanceolata cultivars planted in continuous-plantation soils

et al. 2021

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Background The decrease in Cunninghamia lanceolata (Lamb.) production on continuously planted soil is an essential problem. In this study, two-year-old seedlings of two cultivars (a normal cultivar, NC, and a super cultivar, SC) were grown in two types of soil (not planted (NP) soil; continuously planted (CP) soil) with three watering regimes, and the interactive effects on plant growth and physiological traits were investigated in a greenhouse experiment. The water contents of the soil in the control (CK) (normal water content), medium water content (MWC) and low water content (LWC) treatments reached 75−80 %, 45−50 % and 20−25 % of the field water capacity, respectively. Results The results indicated that the CP soil had a negative effect on growth and physiological traits and that the LWC treatment caused even more severe and comprehensive negative effects. In both cultivars, the CP soil significantly decreased the height increment (HI), basal diameter increment (DI), dry matter accumulation (DMA), net photosynthetic rate (Pn), total chlorophyll content (TChl), carotenoid content (Caro) and photosynthetic nitrogen use efficiency (PNUE). Compared to the NP soil, the CP soil also decreased the proline and soluble protein contents, nitrogen use efficiency (NUE) and phosphorus use efficiency (PUE) and increased the nitrogen:phosphorus ratio in roots, stems and leaves. The LWC treatment decreased growth and photosynthesis, changed ecological stoichiometry, induced oxidative stress, promoted water use efficiency and damaged chloroplast ultrastructure. Significant increases in ascorbate peroxidase (APX), peroxidase (POD), soluble protein and proline contents were found in the LWC treatment. Compared with the NC, the SC was more tolerant to the CP soil and water stress, as indicated by the higher levels of DMA, Pn, and WUE. After exposure to the CP soil and watering regimes, the decreases in biomass accumulation and gas exchange were more pronounced. Conclusions The combination of drought and CP soil may have detrimental effects on C. lanceolata growth, and low water content enhances the impacts of CP soil stress on C. lanceolata seedlings. The superiority of the SC over the NC is significant in Chinese fir plantation soil. Therefore, continuously planted soil can be utilized to cultivate improved varieties of C. lanceolata and maintain water capacity. This can improve their growth and physiological performance to a certain extent.

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Section: Discussionsupporting

confidence: 91%

Drought stress introduces growth, physiological traits and ecological stoichiometry changes in two contrasting Cunninghamia lanceolata cultivars planted in continuous-plantation soils

et al. 2021

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“…Pant biomass decreased signi cantly in the two cultivars affected by drought stress, similar to the results of previous studies reported for other plants species [23,24]. The effect might be due to decreases in photosynthesis and chlorophyll content [25].…”

Section: Discussionsupporting

confidence: 89%

Drought stress introduces growth, physiological traits and ecological stoichiometry changes in two contrasting Cunninghamia lanceolata cultivars planted in continuous-plantation soils

Bian

Wang

Duan

et al. 2021

Preprint

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Background: The decrease of Cunninghamia lanceolata (Lamb.) production on continually planted soil is an essential problem. In this study, two cultivars (a normal cultivar, NC, and a super cultivar, SC) with two-year-old seedlings were grown in two types of soil (non-planting of Chinese fir, NP soil; continuous planting of Chinese fir, CP soil) with three watering regimes, and the interaction effects on plant growth and physiological traits were investigated. Results: The water contents of normal water control (CK), medium water content (MWC) and low water content (LWC) soil reached 75%-80%, 45%-50% and 20%-25%, respectively, of the field water capacity. The results indicated that both CP soil and LWC soil had negative effects on growth and physiological traits. In both cultivars, CP soil significantly decreased plant growth and the performance of physiological traits. The LWC soil changed the ecological stoichiometry in the three organs, induced oxidative stress, promoted water use efficiency and damaged chloroplast ultrastructure. Compared with NC, the SC cultivar was more tolerant to CP soil and drought stress. Conclusions: The CP soil shows negative effect on C. lanceolata’s physiological traits, and these effects can be exacerbated by drought stress. Therefore, the utilization of continuous planted soil can cultivate improved varieties of C. lanceolata and maintain water capacity. This can improve their growth and physiological performance to a certain extent.

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“…Following the networks’ protocols, nitrogen fertilization was applied in spring and year-round rain-out shelters set up in order to simulate conditions of nitrogen loading and a one in 100-year drought. First analysis within the International Drought Net showed that precipitation reduction (i.e., drought) significantly reduced minimum soil water content and above-ground biomass (mainly in forbs) at the experimental site in Freiburg (Henry et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Loading Enhances Stress Impact of Drought on a Semi-natural Temperate Grassland

et al. 2019

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Two important threats to the sustainable functioning of seminatural grasslands in temperate zones are (1) nutrient loading due to agricultural fertilization and pollution, and (2) the increase of extreme drought events due to climate change. These threats may cause substantial shifts in species diversity and abundance and considerably affect the carbon and water balance of ecosystems. The synergistic effects between those two threats, however, can be complex and are poorly understood. Here, we experimentally investigated the effects of nitrogen addition and extreme drought (separately and in combination) on a seminatural temperate grassland, located in Freiburg (South Germany). To study the grassland response, we combined eddy-covariance techniques with open gas exchange systems. Open gas exchange chambers were connected to an infrared gas analyzer and water isotope spectrometer, which allowed the partitioning of net ecosystem exchange and evapotranspiration. Vegetation parameters were described by species richness, species abundance, and leaf area index. Our results suggest that grassland communities, strongly weakened in their stress response by nitrogen loading, can substantially lose their carbon sink function during drought. While nitrogen addition caused a significant loss in forb species (−25%), precipitation reduction promoted a strong dominance of grass species at season start. Consequently, the grass-dominated and species-poor community suffered from a strong above-ground dieback during the dry summer months, likely caused by lower water use efficiency and weaker drought adaptations of the species community. Over the growing season (April-September), the carbon sequestration of the studied grassland was reduced by more than 60% as a consequence of nitrogen addition. Nitrogen addition in combination with precipitation reduction decreased carbon sequestration by 73%. Eutrophication can severely threaten the resilient functioning of grasslands, in particular when drought periods will increase as predicted by future climate scenarios. Our findings emphasize the importance of preserving high diversity of grasslands to strengthen their resistance against extreme events such as droughts.

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Increased Soil Frost Versus Summer Drought as Drivers of Plant Biomass Responses to Reduced Precipitation: Results from a Globally Coordinated Field Experiment

Cited by 20 publications

References 56 publications

Drought stress introduces growth, physiological traits and ecological stoichiometry changes in two contrasting Cunninghamia lanceolata cultivars planted in continuous-plantation soils

Drought stress introduces growth, physiological traits and ecological stoichiometry changes in two contrasting Cunninghamia lanceolata cultivars planted in continuous-plantation soils

Drought stress introduces growth, physiological traits and ecological stoichiometry changes in two contrasting Cunninghamia lanceolata cultivars planted in continuous-plantation soils

Nitrogen Loading Enhances Stress Impact of Drought on a Semi-natural Temperate Grassland

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