Annual shoot length of temperate broadleaf species responses to drought

Liu, Ming; Pietzarka, Ulrich; Meyer, Matthias; Kniesel, Britt; Roloff, Andreas

doi:10.1016/j.ufug.2022.127592

Cited by 5 publications

(3 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For medicinal plants, the process of drought adaptation is associated with changes in not only medicinal parameters but also eco-physiological variables. These plants are cultured in this way for several reasons; not only is it expected to improve the quality of medicines [ 8 , 9 , 13 ], but it can also promote drought resistance [ 4 , 14 ]. Therefore, the relationship between these two types of changes has a practical meaning for predicting changes in medicinal parameters by monitoring other plant responses.…”

Section: Introductionmentioning

confidence: 99%

“…Drought exerts a strong effect on growth and development in the shoot sprouting of annual plants [ 14 ]. Sprouted new shoots can be harvested as a pool of accumulative secondary metabolites [ 15 , 16 , 17 , 18 ]; hence, drought may reduce the amount of harvested medicinal materials by reducing the total dry mass production in annual shoots.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Light-Emitting Diodes Modify Medicinal Quality of Mown Rabdosia rubescens, with Changes in Growth, Physiology, and Antioxidant Activity, under Drought Stress

Gao,

Meng,

Zhao

et al. 2023

Plants

View full text Add to dashboard Cite

Medicinal plants accommodated by understory habitats can easily suffer over-exploitation in the heavy harvest of natural products. It is necessary to develop a sustainable cultural protocol to provide high-quality stocks for efficient regeneration. Drought places stress on medicinal plants during their culture by limiting new sprout growth and reducing the quality of medicinal extracts. Artificial mediating approaches should be considered in a sustainable regime of medicinal plant culture to test the potential tradeoff between resistance to drought and production ability. In this study, Rabdosia rubescens seedlings were raised in three light-emitting diode (LED) spectra from red (71.7% red, 14.6% green, 13.7% blue), green (26.2% red, 17.4% green, 56.4% blue), and blue (17.8% red, 33.7% green, 48.5% blue) lights. Mown seedlings were subjected to a simulated drought event. Drought stressed the seedlings by reducing the growth, dry mass, nitrogen (N) uptake, and oridonin content. Mowing increased the oridonin content but decreased total C and N accumulation and the δ13C level. The red light benefitted starch accumulation only under the well-watered condition, and the green light induced an upregulation of δ13C but decreased antioxidant activity. Oridonin content was negatively associated with combined δ13C and catalase activity. Overall, either mowing or blue light can be recommended for the culture of R. rubescens to increase oridonin content, alleviating some of the negative consequences of drought.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Light-Emitting Diodes Modify Medicinal Quality of Mown Rabdosia rubescens, with Changes in Growth, Physiology, and Antioxidant Activity, under Drought Stress

Gao,

Meng,

Zhao

et al. 2023

Plants

View full text Add to dashboard Cite

show abstract

“…Information is fromLeuschner et al (2019). 2 Information is fromLiu et al (2022) andKunert and Tomaskova (2020).3 Information is fromZapater et al (2013).4 Information is fromLauri et al (2011).…”

mentioning

confidence: 99%

Sap flow and leaf gas exchange response to a drought and heatwave in urban green spaces in a Nordic city

Ahongshangbam,

Kulmala,

Soininen

et al. 2023

Biogeosciences

View full text Add to dashboard Cite

Abstract. Urban vegetation plays a role in offsetting urban CO2 emissions, mitigating heat through tree transpiration and shading, and acting as deposition surfaces for pollutants. The frequent occurrence of heatwaves and of concurrent drought conditions significantly disrupts the processes of urban trees, particularly their photosynthesis and transpiration rates. Despite the pivotal role of urban tree functioning in delivering essential ecosystem services, the precise nature of their response remains uncertain. We conducted sap flux density (Js) and leaf gas exchange measurements of four tree species (Tilia cordata, Tilia × europaea, Betula pendula, and Malus spp.) located in different urban green areas (Park, Street, Forest, and Orchard) in Helsinki, Finland. Measurements were made over two contrasting summers 2020 and 2021. Summer 2021 experienced a local heatwave and drought, whereas summer 2020 was more typical of Helsinki. In this study, we aimed to understand the responses of urban tree transpiration (measured with sap flux density) and leaf gas exchange to heatwave and drought conditions, and we examined the main environmental drivers controlling the tree transpiration rate during these periods. We observed varying responses of Js during the heatwave period at the four urban sites. When comparing the heatwave and no heatwave periods, a 35 %–67 % increase in Js was observed at the Park, Forest, and Orchard locations, whereas no significant change was seen at the Street site. Our results also showed that Js was higher (31 %–63 %) at all sites under drought conditions compared with non-dry periods. The higher Js values during the heatwave and dry periods were mainly driven by the high atmospheric demand for evapotranspiration, represented by the high vapor pressure deficit (VPD), suggesting that the trees were not experiencing severe enough heat or drought stress that stomatal control would have decreased transpiration. Accordingly, photosynthetic potential (Amax), stomatal conductance (gs), and transpiration (E) at the leaf level did not change during heatwave and drought periods, excluding the Park site where a significant reduction in gs was seen. VPD explained 55 %–69 % of the variation in the daily mean Js during heatwave and drought periods at all sites. At the Forest site, the increase in Js saturated after a certain VPD level, likely due to low soil water availability during these hot and dry periods. Overall, the heat and drought conditions were untypical of the region but not excessive enough to restrict stomatal control and transpiration, indicating that ecosystem services such as cooling were not at risk.

show abstract

Impact of a water restriction on the summer climatic benefits of trees inside an outdoor street canyon scale model

Thierry,

Herpin,

Levi

et al. 2024

Building and Environment

View full text Add to dashboard Cite

Annual shoot length of temperate broadleaf species responses to drought

Cited by 5 publications

References 75 publications

Light-Emitting Diodes Modify Medicinal Quality of Mown Rabdosia rubescens, with Changes in Growth, Physiology, and Antioxidant Activity, under Drought Stress

Light-Emitting Diodes Modify Medicinal Quality of Mown Rabdosia rubescens, with Changes in Growth, Physiology, and Antioxidant Activity, under Drought Stress

Sap flow and leaf gas exchange response to a drought and heatwave in urban green spaces in a Nordic city

Impact of a water restriction on the summer climatic benefits of trees inside an outdoor street canyon scale model

Contact Info

Product

Resources

About