Arbuscular mycorrhizal fungi improve biomass, photosynthesis, and water use efficiency of Opuntia ficus-indica (L.) Miller under different water levels

被引:6
|
作者
Kebede, Teame G. G. [1 ,2 ]
Birhane, Emiru [1 ,3 ]
Ayimut, Kiros-Meles [4 ]
Egziabher, Yemane G. G. [4 ]
机构
[1] Mekelle Univ, Coll Dryland Agr & Nat Resource, Dept Land Resource Management & Environm Protect, Mekelle 231, Ethiopia
[2] Adigrat Univ, Coll Agr & Environm Sci, Dept Anim Prod & Technol, Adigrat 50, Ethiopia
[3] Mekelle Univ, Inst Climate & Soc, Mekelle 231, Ethiopia
[4] Mekelle Univ, Coll Dryland Agr & Nat Resource, Dept Dryland Crop & Hort Sci, Mekelle 231, Ethiopia
关键词
biomass; cactus pear; cladode growth; photosynthesis; water stress; water use efficiency; PHYSIOLOGICAL-RESPONSES; CACTUS PEARS; GROWTH; CLADODES; DIVERSITY; COMMUNITIES; GREENHOUSE; DYNAMICS; SPP;
D O I
10.1007/s40333-023-0022-7
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Opuntia ficus-indica (L.) Miller is a CAM (crassulacean acid metabolism) plant with an extraordinary capacity to adapt to drought stress by its ability to fix atmospheric CO2 at nighttime, store a significant amount of water in cladodes, and reduce root growth. Plants that grow in moisture-stress conditions with thick and less fine root hairs have a strong symbiosis with arbuscular mycorrhizal fungi (AMF) to adapt to drought stress. Water stress can limit plant growth and biomass production, which can be rehabilitated by AMF association through improved physiological performance. The objective of this study was to investigate the effects of AMF inoculations and variable soil water levels on the biomass, photosynthesis, and water use efficiency of the spiny and spineless O. ficus-indica. The experiment was conducted in a greenhouse with a full factorial experiment using O. ficus-indica type (spiny or spineless), AMF (presence or absence), and four soil water available (SWA) treatments through seven replications. Water treatments applied were 0%-25% SWA (T1), 25%-50% SWA (T2), 50%-75% SWA (T3), and 75%-100% SWA (T4). Drought stress reduced biomass and cladode growth, while AMF colonization significantly increased the biomass production with significant changes in the physiological performance of O. ficus-indica. AMF presence significantly increased biomass of both O. ficus-indica plant types through improved growth, photosynthetic water use efficiency, and photosynthesis. The presence of spines on the surface of cladodes significantly reduced the rate of photosynthesis and photosynthetic water use efficiency. Net photosynthesis, photosynthetic water use efficiency, transpiration, and stomatal conductance rate significantly decreased with increased drought stress. Under drought stress, some planted mother cladodes with the absence of AMF have not established daughter cladodes, whereas AMF-inoculated mother cladodes fully established daughter cladodes. AMF root colonization significantly increased with the decrease of SWA. AMF caused an increase in biomass production, increased tolerance to drought stress, and improved photosynthesis and water use efficiency performance of O. ficus-indica. The potential of O. ficus-indica to adapt to drought stress is controlled by the morpho-physiological performance related to AMF association.
引用
收藏
页码:975 / 988
页数:14
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