Plant dry weight and nutritive value of genetically diverse germplasm of false Rhodes grass [<i>Leptochloa crinita</i> (Lag.) P.M. Peterson and N.W. Snow], a native forage grass from arid regions of the Americas

Dominguez, Deolindo Luis Esteban; Cavagnaro, Juan Bruno; Pérez, María Dolores; Cavagnaro, Pablo Federico

doi:10.1002/csc2.20678

Cited by 3 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…P.M. Peterson and N.W. Snow, known as false Rhodes grass and multiflower false Rhodes grass, respectively, are considered valuable native forage resources for arid and semiarid rangelands in Argentina and the United States [ 19 , 20 , 21 ]. Both species are warm-season perennial bunchgrasses [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions

Marinoni

Zabala

Quiroga

et al. 2022

Plants

View full text Add to dashboard Cite

The false Rhodes grasses [Leptochloa crinita (Lag.) P.M. Peterson and N.W. Snow and Leptochloa pluriflora (E. Fourn.) P.M. Peterson and N.W. Snow] are considered valuable native forage resources for arid and semiarid rangelands in Argentina and the United States. Effectively using plant materials as forage under aridity conditions requires understanding their resource allocation under those conditions. In the present study, plant functional traits were evaluated in six populations of each false Rhodes grass species from different geographic origin in a humid and an arid region. The evaluation was focused on seed weight, due to the key role of this trait in plant survival. The implication of seed weight in germination under osmotic stress and trade-off relationships between functional traits were also analysed. A fixed ontogenetic variation was found in both species, since populations maintained a stable seed weight across environments. The tolerance to osmotic stress at germination stage was more related to seed weight than to population origin or maternal environment of seeds; heavier-seeded populations produced heavier seedlings instead of a higher number of germinated seeds or higher germination rates. Some traits varied between environments but other traits exhibited a fixed response. Variation patterns among populations were similar within environments and in some cases even for populations from the same geographic origin, revealing a fixed ontogenetic variation; this phenomenon was clearer in L. crinita than in L. pluriflora. Moreover, several different trade-off strategies were detected in both species. These results reinforce the knowledge about the key role of seed weight in survival and performance of seedlings at initial growth stages under arid conditions; however, at advanced stages, other traits would have an important function in growth and development of false Rhodes grasses.

show abstract

Section: Introductionmentioning

confidence: 99%

Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions

Marinoni

Zabala

Quiroga

et al. 2022

Plants

View full text Add to dashboard Cite

show abstract

Variation in pollen viability among Leptochloa crinita accessions: implications for directed crosses

Dominguez,

Remy,

Kozub

et al. 2024

Botany Letters

View full text Add to dashboard Cite

Genetic diversity for drought tolerance in the native forage grass Trichloris crinita and possible morpho-physiological mechanisms involved

et al. 2023

Self Cite

View full text Add to dashboard Cite

IntroductionThe use of drought tolerant genotypes is one of the main strategies proposed for coping with the negative effects of global warming in dry lands. Trichloris crinita is a native forage grass occupying extensive arid and semi-arid regions in the American continent, and used for range grazing and revegetation of degraded lands.MethodsTo identify drought-tolerant genotypes and possible underlying physiological mechanisms, this study investigated drought tolerance in 21 genetically diverse T. crinita genotypes under natural field conditions. The accessions were grown under irrigated (control) and drought conditions for 84 days after initiation of the drought treatment (DAIDT), which coincided with flowering initiation. Various morpho-physiological traits were monitored, including total-, foliage-, and root biomass yield, dry matter partitioning to individual plant organs (roots, leaves, stems, and panicles), total leaf area, chlorophyll content, photochemical efficiency of photosystem II, stomatal conductance, and number of panicles per plant.Results and discussionBroad and significant variation (p<0.001) was found among the accessions for all the traits. Three highly tolerant and three very sensitive accessions were identified as the most contrasting materials, and their responses to drought stress were confirmed over two years of experiments. Under prolonged drought conditions (84 DAIDT), the tolerant accessions were generally more productive than the rest for all the biomass yield components analyzed, and this was associated with a postponed and more attenuated decrease in variables related to the plant photosynthetic activity, such as stomatal conductance, chlorophyll content, and photochemical efficiency. In contrast to previous findings, our data indicate no direct relationship between drought tolerance and the level of aridity in the accessions natural habitats, but rather suggest genetic heterogeneity and ample variation for drought tolerance in T. crinita natural populations derived from a particular location or environment. Also, having low total and forageable biomass yield, or increased biomass allocation to the roots (i.e., lower foliage/root ratio), under optimal water availability, were not associated with greater drought tolerance. The drought-tolerant accessions identified are of value for future genetic research and breeding programs, and as forage for range grazing and revegetation in arid regions.

show abstract

Plant dry weight and nutritive value of genetically diverse germplasm of false Rhodes grass [Leptochloa crinita (Lag.) P.M. Peterson and N.W. Snow], a native forage grass from arid regions of the Americas

Cited by 3 publications

References 38 publications

Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions

Seed Weight and Trade-Offs: An Experiment in False Rhodes Grasses under Different Aridity Conditions

Variation in pollen viability among Leptochloa crinita accessions: implications for directed crosses

Genetic diversity for drought tolerance in the native forage grass Trichloris crinita and possible morpho-physiological mechanisms involved

Contact Info

Product

Resources

About