Analysis of photosynthetic characteristics and karyotype in Arundo donax

doi:10.14088/j.cnki.issn0439-8114.2026.01.029

Abstract

Abstract: To clarify the photosynthetic characteristics and chromosomal features of Arundo donax, a systematic identification of the photosynthetic pattern and karyotype of different Arundo donax germplasm materials was conducted. The photosynthetic type was comprehensively determined through leaf anatomical structure observation (scanning electron microscopy), C₄ photosynthetic enzyme activity assay, and carbon isotope ratio (^δ13C) analysis, and the chromosome number and structural characteristics were cytogenetically identified using fluorescence in situ hybridization (FISH). The results showed that Arundo donax possessed a Kranz anatomy, exhibiting typical structural characteristics of a C₄ plant. Both Lyuzhou 1 and Ninglu 1 showed clear 5S rDNA hybridization signals on four chromosomes, indicating a high conservation in the number of rDNA loci between the two materials. It was speculated that both Lyuzhou 1 and Ninglu 1 might be tetraploids or aneuploids close to nonaploids.

Key words: Arundo donax, photosynthetic characteristics, karyotype, C₄ plant

CLC Number:

ZHONG Nan, CHEN Yu-chao, GUO Sheng-hu, LIU Xuan, TIAN Li, GAN Xiao-yan. Analysis of photosynthetic characteristics and karyotype in Arundo donax[J]. HUBEI AGRICULTURAL SCIENCES, 2026, 65(1): 181-185.

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