Responses of loblolly pine (mesophyte) and swamp tupelo (hydrophyte) seedlings to soil flooding and phosphorus

Autor:	D. S. DeBell, D. D. Hook, W. H. McKee, J. L. Askew
Rok vydání:	1983
Předmět:	Rhizosphere geography geography.geographical_feature_category Phosphorus fungi food and beverages Soil Science chemistry.chemical_element Moisture stress Plant Science Biology biology.organism_classification Swamp Nutrient Agronomy chemistry Tupelo Aquatic plant Botany Mesophyte
Zdroj:	Plant and Soil. 71:387-394
ISSN:	1573-5036 0032-079X
DOI:	10.1007/bf02182680
Popis:	In a pot study, flooding reduced growth of loblolly pine (LP) seedlings and caused an imbalance of nutrients, particularly Fe, in the tops. Swamp tupelo (ST) suffered none of these problems. Also under anaerobiosis, LP roots leaked 85 percent of total ethanol production into solution whereas ST leaked only 55 percent. Application of phosphorus increased LP growth under flooded and drained conditions but ST only under drained conditions. The differential response of the two species to flooding suggests that poor energetics and the leaky nature of LP roots under anaerobiosis restricts its growth in such habitats. Application of phosphorus (P) appears to amend these conditions in LP by reducing moisture stress, reducing nutrient imbalances, and improving energetics in older seedlings. Our results confirm that ST, the hydrophyte, avoids the problems of soil flooding via adaptations in anaerobic metabolism and oxidation of the rhizosphere.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::da3f468ac595ef3e09e8acdf477680db https://doi.org/10.1007/bf02182680 Zobrazit plný text záznamu Full text from SpringerLink