A field experiment
was conducted at the Department of Rice, Tamil Nadu Agricultural University,
Coimbatore, during the 2017 Kharif season to study the effect of silicon on
membrane stability, plant water status and yield of rice genotypes under
drought. Maximum membrane stability index (MSI) (93.1) was observed in CB06803
and minimum (86.2) was observed in CB08702 under control when drought-related
Sahbhagidhan retained maximum MSI (79.8) with lower Malondialdehyde (MDA)
content (0.68 μmol g-1) and lower MSI (67.6) with lower (MDA) content (1.75
μmol g-1) in IR64. Silicon foliar spray (Silixol 0.6 percent) under drought
increased the MSI in Sahbhagidhan to maximum (88.4), wherein CB13805 was
observed at minimum (78.7). In the aspect of plant water status, a greater
decrease of 18 percent in RWC under drought, with lower the reduction in
drought tolerant check Sahbhagidhan (14.5 percent ). Foliar spray of silicon
(Silixol 0.6 percent ) under drought increased the RWC by 12 percent with The
rise in genotype CB13805 (16.3 percent) was greater. However, higher osmotic
potential adjustment was observed in genotype CB12702 (0.674) under drought,
while foliar silicon spray (Silixol 0.6 percent) under drought reduced osmotic
adjustment with a higher shift in genotype CB06803 followed by susceptible IR64
regulation. The chlorophyll fluorescence parameters were significantly
increased by 11 percent, 6 percent, 6.7 percent and 7.7 percent in Fv / Fm, Y
(II), ETR and qP over drought by foliar silicon spray (Silixol 0.6 percent)
under drought. Non-Photochemical Quenching (NPQ) increased by 48% in drought,
but silicon foliar spray (Silixol 0.6%) increased by 48% in drought. The
drought has limited NPQ. With 30 percent under drought, a limited grain yield
per plant was observed, For genotype
CB13804, a reduction (1.9 percent) was observed. Silicon (Silixol 0.6 percent)
foliar spray below Drought increased by 23% with a higher increase (43%) in
genotype CB12702 per plant yield. The silicon foliar spray (Silixol 0.6
percent) under drought improved the foliar spray under drought, regardless of
the genotypes. In the genotypes above,
membrane stability and plant water status indicate its significance for Reducing the effects of drought and improving
the rice mechanism for drought tolerance. The aggregate outcome The study showed that drought has a dramatic
effect on the rice reproductive level, which is Relieved by the application of
silicon, which increases membrane stability, plant water Attributes of rank and
yield. A drought tolerant search performed better on drought by Sahbhagi Dhan
State and everything in foliar application under drought of silicon as well.
CB12702, CB06803 genotypes and Even in the absence of silicon use, CB13804
showed better performance in drought, while with These two CB13805 genotypes
also demonstrate better performance with silicon foliar spray underneath.
Drought may be due to changes in the various physiological and metabolic
pathways through the silicon presence.
Author (s) Details
N. Gokulraj
Department of Crop Physiology, Tamilnadu Agricultural University,
Coimbatore-641003, India.
Dr. N. V. Ravichandran,
Department of Crop Physiology, Tamilnadu Agricultural University,
Coimbatore-641003, India.
P. Boominathan
Department of Crop Physiology, Tamilnadu Agricultural University,
Coimbatore-641003, India
R. P. Soundararajan
Department of Rice, Tamilnadu Agricultural
University, Coimbatore-641003, India.
View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/274
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