《生物多样性导论》课程教学课件（PPT讲稿）12 植物获取营养的多样性

植物对环境适应的多样性 10 mm

植物对环境适应的多样性

植物对不良环境的适应性 Cassytha,种 寄生植物2 水胁迫条件下 的叶片卷曲 寒冷条件下植物的生理过稻 生长在缺氧泥浆 更的红树林 沙漠条件下的生命 Isoetes,种水生的 CAM植物 小麦/玉米简作中的种间竞争和 外生菌根 蚕豆压米间作中的种间促进作月

植物对不良环境的适应性 Cassytha, 一种 寄生植物 水胁迫条件下 的叶片卷曲 Isoetes, 一种水生的 CAM 植物 沙漠条件下的生命 外生菌根 小麦/玉米间作中的种间竞争和 蚕豆/玉米间作中的种间促进作用 生长在缺氧泥浆 中的红树林 寒冷条件下植物的生理过程

Vesicular-arbuscular mycorrhiza (VAM) are common in herbaceous as well as woody species Courtesy Mark Brundett, CSIRO Australia http://www.ffp.csiro.au/research/mycorrhiza

Vesicular-arbuscular mycorrhiza (VAM) are common in herbaceous as well as woody species Courtesy Mark Brundett, CSIRO Australia http://www.ffp.csiro.au/research/mycorrhiza

Mycorrhizal root system with hyphae(arrow) with spores(S)produced by Glomus mosseae Courtesy Mark Brundett. CSIRO Australia http://www.ffp.csiro.au/research/mycorrhiza

Courtesy Mark Brundett, CSIRO Australia Mycorrhizal root system with hyphae (arrow) with spores (S) produced by Glomus mosseae http://www.ffp.csiro.au/research/mycorrhiza

Vesicular-arbuscular mycorrhiza(VAM)

Vesicular-arbuscular mycorrhiza (VAM)

Root nodules of a legume,showing a pink colour due to leghemoglobin Nitrogen-fixing nodules on leguminous-plant roots

Root nodules of a legume, showing a pink colour due to leghemoglobin

Sesbania rostrata(田菁)，a native legume of West Africa,forms a symbiotic relationship with Azorhizobium caulinodans-both stem and root nodules fix nitrogen

Sesbania rostrata（田菁）, a native legume of West Africa, forms a symbiotic relationship with Azorhizobium caulinodans - both stem and root nodules fix nitrogen

Apart from truly symbiotic nitrogen fixation,there are looser associations and free-living systems System of SYMBIOSIS ASSOCIATION FREE· N2 fixation (e.g.Rhizobium】 (e.g.Azospirillum) LIVING (e.g.Rhodospioriffum) (and microbes involved) (N2◆NH3)】 Energy Sucrose from Root exudates Heterotroph Autotroph source (plant (photo- (Organic C) the host plant from the host plant residues)synthesis) Estimates of fixation rate 50-400 10-200 1-2 10-80 (kg N/haly)

Apart from truly symbiotic nitrogen fixation, there are looser associations and free-living systems

Other nonmycorrhizal plants with special adaptations to acquire nutrients:parasitic and carnivorous plants

Other nonmycorrhizal plants with special adaptations to acquire nutrients: parasitic and carnivorous plants

Carnivorous plants

Carnivorous plants