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- Title
EFFECTS OF SALINE-ALKALI MIXED STRESS ON THE GROWTH AND PHYSIOLOGICAL CHARACTERISTICS OF GIANT JUNCAO (PENNISETUM GIGANTEUM Z. X. LIN).
- Authors
Y. X., MA; G. T., LI; G. H., WANG.; T. Y., LIANG; J. Q. Z., YAN; J. J., LI
- Abstract
In this paper, a pot experiment was conducted to simulate different degrees of saline-alkali stress to explore the response mechanism of Pennisetum giganteum Z. X. Lin to salt stress concerning its growth and physiological characteristics. The results showed that: (1) the growth of plant height decreased obviously with the increase of salt solution concentration; (2) with the increase of concentration, MDA content accumulated intermittently, P. giganteum reduced oxidative damage and maintained normal plant physiological metabolism through the complementary action of antioxidant enzymes SOD and CAT; (3) when the concentration of mixed salt solution was low, all osmotic regulatory substances accumulated slowly, and with the continuous increase of concentration, free proline content increased rapidly, which played a leading role in the process of plant osmotic regulation to ensure its physiological activities; (4) under mixed saline-alkali stress, the roots and stems of P. giganteum absorbed most of the Na+ , and transported K+ to the leaves at the same time.
- Subjects
PENNISETUM; PHYSIOLOGICAL stress; SOLUTION (Chemistry); CENCHRUS purpureus; PLANT metabolism; PLANT growth; ROOT growth; OSMOREGULATION
- Publication
Applied Ecology & Environmental Research, 2021, Vol 19, Issue 1, p75
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1901_075094