Qiang, Q., Gao, Y., Yu, B.,
Wang, M., Ni, W., Li, S.,
Zhang, T., Li, W. and Lin, L.
2020
Elevated CO2 enhances
growth and differentially
affects saponin content i
n Paris polyphylla
var. yunnanensis.
Industrial Crops
& Products 147: 112124.
NOTE:
Multi-leaf paris
( Paris polyphylla )
is a shade-tolerant herb
common to southwestern
China within evergreen
broad-leaved forests.
It is commonly used in
traditional Chinese
medicine because
it has been shown
to successfully
stop bleeding
(Sun et al., 2014),
reduce inflammation
(Zhu et al., 2019)
and inhibit
the proliferation
of cancer cells
(Lee et al., 2009;
Zhang et al., 2018).
There's great interest
in industrializing
this species for use
in producing medicines
and healthcare products.
Unfortunately,
P. polyphylla
requires
up to 10 years
from seed
germination
to harvest.
Qiang et al. (2020)
examined
the response
of two cultivars
of this species
to elevated CO2.
SUMMARY:
Rising CO2 levels
will benefit
the growth of
multi-leaf paris
and its
key secondary
metabolites,
which has
important
medical and
health-related
implications.
Net photosynthesis
at the end of the
30 day experiment,
increased by
approximately 110%
and 178% in the
WY and CY cultivars,
respectively,
which helped lead
to improvements
in water use efficiency
of 87% for WY and
143% for CY.
Elevated CO2 stimulated
plant fresh weight,
increasing it by 11.4%
in the CY cultivar
and by 18.3% in WY.
Production of
steroidal saponins
under elevated
CO2 conditions:
Qiang et al.
report that although
their concentrations
declined slightly, an
"increased amount
of saponins
was produced."
DETAILS:
The work was conducted
in a controlled-environment
greenhouse in Kunming, China.
The two cultivars included
one from a warm and
humid habitat (CY)
and one from a locale
that is cold and dry (WY).
Plants from
both cultivars
at the one-leaf
seedling stage
were subjected
to ambient CO2
( 400 ppm)
or elevated CO2
( 800 ppm )
for a period of 30 days.
All other conditions
were maintained
under normal growth
environments
for the species.
REFERENCES:
Lee, R.K.Y., Ong, R.C.Y., Cheung, J.Y.N., Li, Y.C., Chan, J.Y.W., Lee, M.M.S., Suen, Y.K., Fung, K.P., Ho, H.P., Bao, Y., Li, M., Kwok, T.T. and Kong, S.K. 2009. Polyphyllin D - a potential anti-cancer agent to kill hepatocarcinoma cells with multi-drug resistance. Current Chemical Biology 3: 89-99.
Sun, C.L., Ni, W., Yan, H., Liu, Z.H., Yang, L., Si, Y.A., Hua, Y., Chen, C.X., He, L., Zhao, J.H. and Liu, H.Y. 2014. Steroidal saponins with induced platelet aggregation activity from the aerial parts of Paris verticillata. Steroids 92: 90-95.
Zhang, J.L., Ma, Y.Z., Hu, W.L., Lan, G.Y. 2018. Effects of high temperature stress on physiological indicators of Paris polyphylla var. yunnanensis. Chinese Traditional and Herbal Drugs 36: 100-106.
Zhu, T.T., Wu, W.J., Yang, S.Y., Li, D.L., Sun, D.J. and He, L. 2019. Polyphyllin I inhibits propionibacterium acnes-induced inflammation in vitro. Inflammation 42: 35-44.