Journal
PLANT PHYSIOLOGY AND BIOCHEMISTRY
Volume 139, Issue -, Pages 256-263Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2019.03.028
Keywords
CO2 enrichment; Cucumber; Nitrogen assimilation; Salt sum; Water balance
Categories
Funding
- National Natural Science Foundation of China [31471918, 31872154]
- Shandong Key Research and Development Plan [2017CXGC0201]
- National Science & Technology Support Program of China [2014BAD05B03]
- Shandong Agricultural Major Application Technology Innovation [2016-36]
- Science and Technology Innovation Team of Shandong Agricultural University-Protected Horticulture Advantageous Team [SYL2017YSTD07]
Ask authors/readers for more resources
The effects of CO2 enrichment on water balance and nitrogen (N) assimilation in cucumber (Cucwnis sativus L. cv. Jinyou No.35) seedlings under salt stress were investigated. Two-way randomized block design was used: the main treatment consisted of two [CO2] levels, ambient and enriched (400 and 800 +/- 40 mu mol mol(-1), respectively), and the minor treatment consisted on two salinity treatment levels, 0 and 80 mmol L-1 NaCl. The results showed that, under the experimental conditions, enriched [CO2] and salt stress significantly inhibited the N assimilation process in cucumber leaves; however, enriched [CO2] had no effect on the nitrate (NO3-) reduction or ammonium (NH4+) assimilation of leaves under salt stress, inhibiting only the transamination. Moreover, enriched [CO2] increased the plasma membrane H+-ATPase activity, vacuolar membrane H+-ATPase activity and root hydraulic conductivity under salt stress, thereby increasing the ion selective absorption and water absorption capacity. To a certain extent, enriched [CO2] promoted the accumulation of K+ in plants, which significantly reduced the Na+/K+ ratio; moreover, the enrichment ultimately improved the water state conditions and helped to maintain the ion balance in plants under stress, ensuring normal enzymatic activity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available