Hypobaria and hypoxia affects phytochemical production, gas exchange, and growth of lettuce

Title:

Hypobaria and hypoxia affects phytochemical production, gas exchange, and growth of lettuce

Creator:

He, C., Jacobo-Velázquez, D. A., Cisneros-Zevallos, L., and Davies, F. T.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:d1bd032e-a796-4e1b-82ac-7a6d0d4f744e
uuid:d1bd032e-a796-4e1b-82ac-7a6d0d4f744e
issn:0300-3604
doi:10.1007/s11099-013-0047-9

Subject:

fotosyntéza, photosynthesis, bioprotectants, carbon assimilation, chlorophyll content, dark respiration rate, Lactuca sativa, low pressure, oxygen radical absorbance capacity, phytochemicals, 2, and 581

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Hypobaria (low total atmospheric pressure) is essential in sustainable, energy-efficient plant production systems for long-term space exploration and human habitation on the Moon and Mars. There are also critical engineering, safety, and materials handling advantages of growing plants under hypobaria, including reduced atmospheric leakage from extraterrestrial base environments. The potential for producing crops under hypobaria and manipulating hypoxia (low oxygen stress) to increase health-promoting bioactive compounds is not well characterized. Here we showed that hypobaric-grown lettuce plants (25 kPa ≈ 25% of normal pressure) exposed to hypoxia (6 kPa pO2 ≈ 29% of normal pO2) during the final 3 d of the production cycle had enhanced antioxidant activity, increased synthesis of anthocyananins, phenolics, and carotenoids without reduction of photosynthesis or plant biomass. Net photosynthetic rate (PN) was not affected by total pressure. However, 10 d of hypoxia reduced PN, dark respiration rate (RD), PN/RD ratio, and plant biomass. Growing plants under hypobaria and manipulating hypoxia during crop production to enhance health-promoting bioactive compounds is important for the health and well-being of astronauts exposed to space radiation and other stresses during long-term habitation. and C. He ... [et al.].

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

465-473

Source:

Photosynthetica | 2013 Volume:51 | Number:3

Harvested from:

CDK

Metadata only:

false