Organizing co mmittee

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Poster presentation 
129 
GUAIANOLIDE AUSTRICIN IS A RICE YIELD STIMULANT 
I.D. Sham’yanov
1
, R.F. Mukhamatkhanova
1
, B.S. Okhundedaev
1
, N.D. Abdullaev
1
,
S.Kh. Zakirov
2
, Z.Sh. Mukhidova
2
, N.G. Otamirzaev
3
, M.A. Sattarov
3
 
1) S.Yu. Yunusov Institute of the Chemistry of Plant Substances Academy of sciences of 
the Republic of Uzbekistan st. Mirzo-Ulugbek, 77, 100170 Tashkent
e-mail: [e-mail] 
2) Tashkent State Agrarian University, Republic of Uzbekistan, 100140,
Tashkent region, Kibray district, st. University, 2 
3) Research Institute of Rice Growing, Republic of Uzbekistan, 111506, Tashkent 
region, Urtachirchik district, mahalla "Sholikor", st. Madaniyat 
The creation and use of non-toxic natural preparations that act as phytohormones in 
ultra-low concentrations is relevant. This is also true for the cultivation of rice, since 
rice is one of the staple foods of the inhabitants of Southeast Asian countries, including 
Uzbekistan. 
The most optimal method is the use of plant growth biostimulants during presowing 
seed treatment, which allows you to increase the energy of seed germination, get quick 
and friendly shoots, increase the development of the root system and plant biomass, leaf 
surface area and chlorophyll content, and increase yield capacity. 
As a result of the research, the growth-regulating properties of the sesquiterpene 
lactone austricin were brought out, which make it possible to increase the yield of rice 
with a single pre-sowing treatment. 
The results of the stimulating activity of austricin obtained under the conditions of a 
small-plot field experiment in comparison with the widely used drug Edagum SM are 
presented in Table 1. 
Table 1. Rice yield indicators 
№ 
Type
of 
expe
rie
n
ce
Numbe
r of
plants 
pe
r 
1 m
2
, piec
es
de
gre
e o
f 
bushi
ne
ss
P
lant gr
owth, c
m
P
anicle
length, c
m
Grain weight of 
one panicle, 
(average), g 
W
eight
1000 pc
s. 
gra
ins, g
B
iol
ogica
l yi
eld, g
R
ea
l yi
eld 
ca
pa
cit
y, 
ce
ntner
/ha
Ma
in 
pa
nicle
La
ter
al 
pa
nicle
1 
Control 
240 
1,12 
127 
25,3 
1,8 
0,8 
28,9 
698 
55,9 
2 
Edagum 
SM 
255 
1,13 
132 
27,8 
1,8 
0,9 
32,1 
864 
65,4 
3 
Austricin 
50 g/ton 
seeds 
262 
1,12 
135 
27,9 
2,2 
1,0 
33,3 
880 
70,4 
The data presented in the table indicate that austricin has a high stimulating activity 
at low concentrations, which leads to an increase in rice yield, exceeding the widely 
used drug Edagum SM. 
Austricin, as a means for pre-sowing treatment of rice seeds, is covered by the patent 
of the Republic of Uzbekistan No. IAP 070990 dated 31.10 2022. 

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Poster presentation 
130