Yun-feng YAO, Yi-yi XIONG, Wei-chen XIONG, et al. Plant Identification of Different Growth Forms of Justicia procumbens and Comparison of Their Chemical Components Content. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(21):140-147(2019)
DOI:
Yun-feng YAO, Yi-yi XIONG, Wei-chen XIONG, et al. Plant Identification of Different Growth Forms of Justicia procumbens and Comparison of Their Chemical Components Content. [J]. Chinese Journal of Experimental Traditional Medical Formulae 25(21):140-147(2019) DOI: 10.13422/j.cnki.syfjx.20191411.
Plant Identification of Different Growth Forms of Justicia procumbens and Comparison of Their Chemical Components Content
To identify two different growth types vertical growth (V-class) and lateral growth (L-class)) of
Justicia procumbens
and compare the contents of chemical compounds between upper part and different organs.
Method:
2
DNA was extracted from the leaves of two growth forms of
J
.
procumbens
. Internal transcriptional spacer 2 (ITS2) and
psb
A-
trn
H sequences were obtained by polymerase chain reaction (PCR) amplification and bidirectional sequencing. High performance liquid chromatography (HPLC) was used to determine the contents of justicidin B (JB) and chinensinaphthol methyl ether (CME) from the above-ground parts of V-class and L-class
J
.
procumbens
and their inflorescence
leaves
and stems. Independent sample
T
-test and Paired-sample
T
-test were used to compare the contents of JB and CME from two different growth forms of
J
.
procumbens
and their different organs.
Result:
2
The DNA sequences after shearing were shown to be identical between the V-class and L-class samples. Independent sample
T
-test showed no difference on the content of JB between the above-ground parts of V-class and L-class samples
but the content of CME was higher in V-class
J
.
procumbens
than L-class (
P
<
0.05). Paired-sample
T
-test showed that the content of JB and CME were different in the inflorescence
leaves
and stems of
J
.
procumbens
(
P
<
0.05)
and the contents in inflorescence and leaves were much higher than those in stems. At the same time
we found the content of CME in inflorescence and leaves of V-class
J
.
procumbens
was higher than that in L-class.
Conclusion:
2
DNA barcoding and comparison of JB and CME content indicated that the two different growth forms of
J
.
procumbens
belong to the same species. The contents of CME were different in
J
.
procumbens
between different growth forms
and was higher in V-class. Meanwhile
due to the little content of JB and CME in stems
the best picking time of
J
.
procumbens
is the flowering and fruiting period with more inflorescence and leaves.
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