Morphological and physiological responses of the potato stem transport tissues to dehydration stress

Aliche, Ernest B.; Prusova-Bourke, Alena; Ruiz-Sanchez, Mariam; Oortwijn, Marian; Gerkema, E.; As, Henk Van; Visser, R.G.F.; Linden, C. Gerard van der

doi:10.1007/s00425-019-03336-7

Cited by 26 publications

(18 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The loss of water is regulated through the opening and closing of stomata. If the stomata are opened continuously, there is a constant water loss via transpiration without replenishment of the loss from soil, and thus, the potato plant loses its turgidity and undergoes water stress [97]. Along with the reduction in the water uptake in the plant under salt stress, the relative water content (RWC) was also found to decrease significantly [98].…”

Section: Water Status In Plantsmentioning

confidence: 99%

Salinity Stress in Potato: Understanding Physiological, Biochemical and Molecular Responses

Chourasia

Lal

Tiwari

et al. 2021

Life

112

View full text Add to dashboard Cite

Among abiotic stresses, salinity is a major global threat to agriculture, causing severe damage to crop production and productivity. Potato (Solanum tuberosum) is regarded as a future food crop by FAO to ensure food security, which is severely affected by salinity. The growth of the potato plant is inhibited under salt stress due to osmotic stress-induced ion toxicity. Salinity-mediated osmotic stress leads to physiological changes in the plant, including nutrient imbalance, impairment in detoxifying reactive oxygen species (ROS), membrane damage, and reduced photosynthetic activities. Several physiological and biochemical phenomena, such as the maintenance of plant water status, transpiration, respiration, water use efficiency, hormonal balance, leaf area, germination, and antioxidants production are adversely affected. The ROS under salinity stress leads to the increased plasma membrane permeability and extravasations of substances, which causes water imbalance and plasmolysis. However, potato plants cope with salinity mediated oxidative stress conditions by enhancing both enzymatic and non-enzymatic antioxidant activities. The osmoprotectants, such as proline, polyols (sorbitol, mannitol, xylitol, lactitol, and maltitol), and quaternary ammonium compound (glycine betaine) are synthesized to overcome the adverse effect of salinity. The salinity response and tolerance include complex and multifaceted mechanisms that are controlled by multiple proteins and their interactions. This review aims to redraw the attention of researchers to explore the current physiological, biochemical and molecular responses and subsequently develop potential mitigation strategies against salt stress in potatoes.

show abstract

Section: Water Status In Plantsmentioning

confidence: 99%

Salinity Stress in Potato: Understanding Physiological, Biochemical and Molecular Responses

Chourasia

Lal

Tiwari

et al. 2021

Life

112

View full text Add to dashboard Cite

show abstract

“…Potato ( Solanum tuberosum L.), introduced to Europe from the Americas during the second half of the 16th century, is extensively cultivated throughout the world, being the world’s fourth largest food crop, after maize, wheat, and rice [ 1 ], with a total global cultivation land area of about 20 million hectares [ 2 , 3 ]. The leaf miner Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is one of the most harmful phytophagous pests and has restricted the production of tomato worldwide, causing severe problems by reducing yield in both open fields and greenhouse conditions [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Changes in Light Energy Utilization in Photosystem II and Reactive Oxygen Species Generation in Potato Leaves by the Pinworm Tuta absoluta

et al. 2021

View full text Add to dashboard Cite

We evaluated photosystem II (PSII) functionality in potato plants (Solanum tuberosum L.) before and after a 15 min feeding by the leaf miner Tuta absoluta using chlorophyll a fluorescence imaging analysis combined with reactive oxygen species (ROS) detection. Fifteen minutes after feeding, we observed at the feeding zone and at the whole leaf a decrease in the effective quantum yield of photosystem II (PSII) photochemistry (ΦPSII). While at the feeding zone the quantum yield of regulated non-photochemical energy loss in PSII (ΦNPQ) did not change, at the whole leaf level there was a significant increase. As a result, at the feeding zone a significant increase in the quantum yield of non-regulated energy loss in PSII (ΦNO) occurred, but there was no change at the whole leaf level compared to that before feeding, indicating no change in singlet oxygen (1O2) formation. The decreased ΦPSII after feeding was due to a decreased fraction of open reaction centers (qp), since the efficiency of open PSII reaction centers to utilize the light energy (Fv′/Fm′) did not differ before and after feeding. The decreased fraction of open reaction centers resulted in increased excess excitation energy (EXC) at the feeding zone and at the whole leaf level, while hydrogen peroxide (H2O2) production was detected only at the feeding zone. Although the whole leaf PSII efficiency decreased compared to that before feeding, the maximum efficiency of PSII photochemistry (Fv/Fm), and the efficiency of the water-splitting complex on the donor side of PSII (Fv/Fo), did not differ to that before feeding, thus they cannot be considered as sensitive parameters to monitor biotic stress effects. Chlorophyll fluorescence imaging analysis proved to be a good indicator to monitor even short-term impacts of insect herbivory on photosynthetic function, and among the studied parameters, the reduction status of the plastoquinone pool (qp) was the most sensitive and suitable indicator to probe photosynthetic function under biotic stress.

show abstract

“…We derived a potato‐specific lower limit for the phloem sucrose loading rate of 1e‐8 mol/s, which is of the same order of magnitude as values used in previous studies when scaling these to the dimensions of our potato model (0.59e‐8 mol/s for Thompson and Holbrook (2003) and 6.24e‐8 mol/s for Hölttä et al (2006). Our initial parameter settings resulted in a steady‐state flow velocity in the base of the stem of 0.23 mm/s, which is in the same order of magnitude as the 0.34 mm/s measured in potato (Aliche et al, 2020; Prusova, 2016). Given that sieve tube radius data were taken from tomato rather than potato, we decreased sieve tube radius by 21.5% to 8.4e‐6m to reproduce the measured potato sap flow velocity of 0.34 mm/s, equal to a transit time of 49 min.…”

Section: Resultsmentioning

confidence: 56%

Modelling the physiological relevance of sucrose export repression by an Flowering Time homolog in the long‐distance phloem of potato

Herik

Bergonzi

Bachem

et al. 2020

Plant Cell & Environment

View full text Add to dashboard Cite

Yield of harvestable plant organs depends on photosynthetic assimilate production in source leaves, long‐distance sucrose transport and sink‐strength. While photosynthesis optimization has received considerable interest for optimizing plant yield, the potential for improving long‐distance sucrose transport has received far less attention. Interestingly, a recent potato study demonstrates that the tuberigen StSP6A binds to and reduces activity of the StSWEET11 sucrose exporter. While the study suggested that reducing phloem sucrose efflux may enhance tuber yield, the precise mechanism and physiological relevance of this effect remained an open question. Here, we develop the first mechanistic model for sucrose transport, parameterized for potato plants. The model incorporates SWEET‐mediated sucrose export, SUT‐mediated sucrose retrieval from the apoplast and StSP6A‐StSWEET11 interactions. Using this model, we were able to substantiate the physiological relevance of the StSP6A‐StSWEET11 interaction in the long‐distance phloem for potato tuber yield, as well as to show the non‐linear nature of this effect.

show abstract

Morphological and physiological responses of the potato stem transport tissues to dehydration stress

Abstract: Main conclusion Adaptation of the xylem under dehydration to smaller sized vessels and the increase in xylem density per stem area facilitate water transport during water-limiting conditions, and this has implications for assimilate transport during drought.

Cited by 26 publications

References 74 publications

Salinity Stress in Potato: Understanding Physiological, Biochemical and Molecular Responses

Salinity Stress in Potato: Understanding Physiological, Biochemical and Molecular Responses

Changes in Light Energy Utilization in Photosystem II and Reactive Oxygen Species Generation in Potato Leaves by the Pinworm Tuta absoluta

Modelling the physiological relevance of sucrose export repression by an Flowering Time homolog in the long‐distance phloem of potato

Contact Info

Product

Resources

About