Assessing drought resistance in seashore paspalum genotypes using leaf gas exchange, osmotic adjustment, and rooting characteristics

Abstract

The objective of this study was to compare drought resistance in a range of seashore paspalum (Paspalum vaginatum Sw.) genotypes and identify associated morphological and physiological traits. Fifteen genotypes were grown in growth chamber conditions and exposed to well‐watered and drought‐stress treatments. Genotypes ‘Seaisle1’ and PI647891 were consistent top performers, whereas ‘Seastar’ and PI614680 performed poorly as measured by turf quality, percentage green cover, and relative water content when exposed to drought stress. Observed levels of drought resistance had no significant relation with morphological traits such as leaf width and internode length but were found to be associated with various physiological traits. Drought resistant genotypes were able to better maintain membrane stability, photosynthesis, and had greater water use efficiency compared with sensitive genotypes. Earlier osmotic adjustment at 7 d via faster osmolyte accumulation was a significant contributor to performance during drought. Drought‐resistant Seaisle1 and PI647891 had deeper roots and greater root length density than drought sensitive ‘Seastar’ and PI614680. Results showing variability in the level of drought resistance and associated mechanisms in understudied seashore paspalum genotypes could facilitate future breeding efforts for developing drought‐resistant turfgrass cultivars.

Effect of Banana-Waste Biochar and Compost Mixtures on Growth Responses and Physiological Traits of Seashore Paspalum Subjected to Six Different Water Conditions

“…These findings are consistent with previous studies on which they found that biochar increased plant growth under drought conditions [21,22]. Katuwal et al [23] reported that under drought, seashore paspalum limited the gas-exchange process by maintaining its stomatal conductance and closing its stomata. Furthermore, Pompeiano et al [8] found that seashore paspalum and bermudagrass could increase roots even in salinity intermediate stress.…”

Improving the physiological responses and stomatal characteristics of Paspalum vaginatum during the winter season

“…In accordance with our findings, similar studies showed that adding biochar improved photosynthesis and stomatal conductance even in harsh conditions [1,20]. Actually, in the absence of biochar [2] discovered that plants can survive without organic amendments, in addition, adhere to stringent stomatal limitations, which mostly led to a reduction in transpiration E and CO2 supply for photosynthetic activity escape [16] reported that under drought, seashore paspalum limited IOP Publishing doi:10.1088/1755-1315/1090/1/012017 5 the gas exchange process by maintaining its stomatal conductance and closing its stomata. As an adjustment to tough conditions, P. vaginatum tended to close its stomata as an adjustment mode to avoid the water escape.…”

Assessment of turf quality in Paspalum vaginatum Sw. accessions of Sumatra, Java, and Bali (Indonesia) with clay and amended sand growing media

“…High morphological variability becomes a desire for germplasm conservation and parents' selection in breeding programs (Khadivi-Khub et al 2014). Assessment of the morphology characteristics of seashore paspalum indicates a potential to improve resistance in future turfgrass cultivars (Katuwal et al 2021). Therefore, the leaf size of turfgrass affects evapotranspiration and is related to water consumption (Xu et al 2013).…”