Leaf Anatomical Structure and Photosynthetic Characteristics of Megaskepasma erythrochlamys and Pachystachys lutea in Greenhouse

doi:10.11924/j.issn.1000-6850.casb19010007

Abstract

Abstract:

To illustrate the leaf anatomical structure and photosynthetic characteristics of two Acanthaceae Plants, this study investigated Megaskepasma erythrochlamys and Pachystachys lutea in the greenhouse of Qingdao World Horticultural Exposition. The leaves were dissected and analyzed by paraffin imbedding method and the photosynthetic characteristics of leaves were measured by CIRAS-3 portable photosynthesis system. The results showed that in the same environment, the internal structures of the leaves of the two Acacia plants were similar, the upper epidermis was thicker than that of the lower, and the sponge tissue was thicker than that of palisade tissue. The photosynthetic indexes had differences, the transpiration rate, stomatal conductance and intercellular CO₂ concentration of Megaskepasma erythrochlamys were larger than those of Pachystachys lutea. However, the water use efficiency and the net photosynthetic rate of Pachystachys lutea were larger than those of Megaskepasma erythrochlamys.

Key words: greenhouse, Acanthaceae, leaf, paraffin section, anatomical structure, photosynthetic characteristics

CLC Number:

S688.9

Li Wei, Fu Zhe, Hao Xiaozhe, Li Qiuyu, Zhang Cuiping. Leaf Anatomical Structure and Photosynthetic Characteristics of Megaskepasma erythrochlamys and Pachystachys lutea in Greenhouse[J]. Chinese Agricultural Science Bulletin, 2020, 36(12): 58-61.

Figures/Tables 2

References 23

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植物名	上表皮	下表皮	栅栏组织	海绵组织	维管束
赤苞花	12.2±2.2	9.3±2.2	40.5±8.0	75.5±6.5	55.2±4.8
黄虾花	16.9±3.4	11.1±2.5	50.0±8.0	92.6±5.2	50.2±8.6

植物名	上表皮	下表皮	栅栏组织	海绵组织	维管束
赤苞花	12.2±2.2	9.3±2.2	40.5±8.0	75.5±6.5	55.2±4.8
黄虾花	16.9±3.4	11.1±2.5	50.0±8.0	92.6±5.2	50.2±8.6

植物名	蒸腾速率/ [mmol H₂O/(m²·s)]	气孔导度/ [mmol H₂O/(m²·s)]	胞间CO₂/ [μmol CO_2/mol]	水分利用效率/ [μmol CO²/molH₂O]	净光合速率/ (μmol CO₂/mol)
赤苞花	12.7	727.3	372.1	0.2536	6.1
黄虾花	10	401.8	317.8	1.0508	4.1

植物名	蒸腾速率/ [mmol H₂O/(m²·s)]	气孔导度/ [mmol H₂O/(m²·s)]	胞间CO₂/ [μmol CO_2/mol]	水分利用效率/ [μmol CO²/molH₂O]	净光合速率/ (μmol CO₂/mol)
赤苞花	12.7	727.3	372.1	0.2536	6.1
黄虾花	10	401.8	317.8	1.0508	4.1