Influence of drought stress on pistil physiology and reproductive success of two<scp><i>Gossypium hirsutum</i></scp>cultivars differing in drought tolerance

Hu, Wei; Huang, Yuming; Bai, Hua; Liu, Yu; Wang, Shanshan; Zhou, Zhiguo

doi:10.1111/ppl.13030

Cited by 17 publications

(5 citation statements)

References 48 publications

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“…Pollen viability is an effective indicator that measures a plant’s ability to develop into seed and fruit; drought stress decreased pollen viability of tomatoes and other crops according to our findings and previous studies (Hu et al ., 2020); nevertheless, this was promoted by our fungal treatments under stressed and nonstressed conditions. Similarly, Talaromyces omanensis enhanced the pollen viability of tomatoes under natural and drought-stress conditions (Halo et al ., 2020).…”

Section: Discussionsupporting

confidence: 88%

Desert endophytic fungi improve reproductive, morphological, biochemical, yield and fruit quality characteristics of tomato under drought stress

Halo¹,

Al-Yahyai

Al-Sadi

et al. 2023

AGJSR

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PurposeCrops are increasingly affected by drought; hence, the current study explored the potential role of three desert endophytic fungi, Aspergillus fumigatus, Aspergillus terreus and Talaromyces variabilis, in conferring drought tolerance in tomato plants.Design/methodology/approachPreserved endophytic fungi from a Rhazya stricta desert plant were adopted to obtain the required fungal treatment; tomatoes received fungal treatments directly in plastic trays and subsequently in pots. Drought was applied using 15% of PEG-6000 at two stages: flowering and fruiting. The following parameters were measured: pollen sterility, growth characteristics, morphological analysis and biochemical analysis, including proline, gibberellic acid (GA3) and chlorophyll measurements; thus, the data were analyzed statistically using SPSS software.FindingsAll applied endophytes significantly promoted pollen viability and tomato yield under stressed and nonstressed conditions. Interestingly, these endophytes significantly enhanced the number of trichomes under drought stress and promoted tomato fruit quality. The colonized tomato plants accumulated a high proline level under drought stress but lower than un-inoculated stressed plants. Also, a significant rise in growth characteristics was observed by A. fumigatus and A. terreus under normal conditions. Moreover, both raised GA3 levels under drought-stressed and nonstressed conditions. Also these two endophytes enhanced chlorophyll and carotenoid contents under drought stress. Fruit characteristics were enhanced by nonstressed T. variabilis and stressed A. fumigatus.Originality/valueThe present endophytic fungi provide impressive benefits to their host in normal and drought-stressed conditions. Consequently, they represent valuable sources as sustainable and environmentally friendly alternatives to mitigate drought stress.

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Section: Discussionsupporting

confidence: 88%

Desert endophytic fungi improve reproductive, morphological, biochemical, yield and fruit quality characteristics of tomato under drought stress

Halo¹,

Al-Yahyai

Al-Sadi

et al. 2023

AGJSR

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“…The strongest Cu/ZnSOD expression in tobacco, assessed by SodCc promoter-β-glucuronidase fusion, was observed, among generative organs, in ovules, stigma and pollen grains (Van Camp et al 1997). In stigmas of stress-resistant cotton cultivar, SOD activity was higher, and the level of ROS was lower than in the sensitive one (Hu et al 2020). At high temperatures in pearl millet, SOD activity on stigma decreased, and the level of ROS increased (Djanaguiraman et al 2018).…”

Section: Discussionmentioning

confidence: 96%

Pattern of ROS generation and interconversion on wet stigmas in basal and divergent angiosperms

Breygina

Luneva

Schekaleva

et al. 2023

Preprint

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The active participation of ROS in the reproductive physiology of flowering plants is well-documented in model species, mainly plants with dry stigmas. Here we studied the release of ROS into stigma exudate – a fluid involved in pollen acceptance on a wet stigma. The study involved plants from different systematic groups: Paeonia suffruticosa, Nicotiana tabacum, Lilium hybr., Aristolochia manshuriensis and Berberis vulgaris; in most cases, exudate was collected from intact flowers on the whole plant to minimize the effect of experimental intervention on the sensitive redox balance system. The dynamics of total oxidizing capacity of stigma exudate was assessed by EPR spectroscopy and different stigma staining. The level of hydrogen peroxide and the activity of superoxide dismutase, which catalyzes H2O2 formation, was also evaluated. In all the plants studied, total ROS level increased with stigma maturation, however, H2O2 concentration decreased in studied representatives of eudicots, except for peony. In lily it increased, while in birthwort it remained low, which was apparently due to the absence of SOD activity. In all divergent plants studied, the enzyme was active on stigmas with two isoenzymes. During the fertile period, activity was higher than at an earlier stage. Based on the obtained data, we speculate on primitive and progressive patterns of ROS generation and transformation on stigma and its possible evolution.

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“…Similarly, under salt stress, the expression of antioxidant enzyme-related genes (encoding APX and POD) in Arabidopsis thaliana L. pistils decreased, leading to large amounts of ROS, which ultimately led to the ovule abortion (Sun et al, 2005). Our previous study has found that drought during flowering will cause a higher H 2 O 2 level in cotton pistils to damage ovule activities, decreasing the fertilization rate (Hu et al, 2020).…”

Section: Asa Can Effectively Eliminate Omentioning

confidence: 98%

“…Similarly, under salt stress, the expression of antioxidant enzyme‐related genes (encoding APX and POD) in Arabidopsis thaliana L. pistils decreased, leading to large amounts of ROS, which ultimately led to the ovule abortion (Sun et al., 2005). Our previous study has found that drought during flowering will cause a higher H 2 O 2 level in cotton pistils to damage ovule activities, decreasing the fertilization rate (Hu et al., 2020). Nevertheless, studies on the effects of drought during the development of cotton ovule on ovule cytological structure and physiological and biochemical metabolism, and its relationship with the ovule formation are still not explored.…”

Section: Introductionmentioning

confidence: 99%

Soil drought during the development of cotton ovule destroyed the antioxidant balance of cotton pistil to hinder the ovule formation

Cheng,

Wang,

Cao

et al. 2024

J Agronomy Crop Science

Self Cite

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Reproductive failure in cotton caused by drought has been reported to be closely associated with alterations in pistil fertility; however, the mechanism of the effect of drought on pistil fertility in cotton is less studied. We hypothesized that drought would inhibit the ovule formation to alter pistil potential fertility. To address this hypothesis, we conducted a water deficit induction experiment with a cotton cultivar, Dexiamian 1. Results showed that drought damaged the cytological structure of the developing ovules. This resulted in a lower ovule number, finally leading to lower cottonseed number and boll weight. And the decreased ovule number was closely related to the reactive oxygen species (ROS) accumulation in pistil during ovule development. Further analysis of antioxidant metabolism found that in the enzymatic antioxidant system, drought decreased the activities of superoxide dismutase (SOD) and catalase (CAT), resulting in the accumulation of superoxide anion () and hydrogen peroxide (H2O2). Regarding the non‐enzymatic antioxidant system, the elevated glutathione reductase gene (GhGR) expression under drought promoted the glutathione (GSH) accumulation; however, the decreased dehydroascorbate reductase gene (GhDHAR2) expression under drought inhibited the conversion of GSH to ascorbic acid (AsA). Although the increased monodehydroascorbate reductase gene (GhMDHAR) expression under drought promoted AsA accumulation, drought‐induced reduced ascorbate peroxidase gene (GhAPX) expression inhibited the reduction of H2O2 by AsA, which ultimately led to higher AsA content and H2O2 content. We conclude that drought impedes the ovule formation by disturbing pistil's antioxidant metabolic homeostasis to destruct the cytological structure of the developing ovules.

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Influence of drought stress on pistil physiology and reproductive success of twoGossypium hirsutumcultivars differing in drought tolerance

Cited by 17 publications

References 48 publications

Desert endophytic fungi improve reproductive, morphological, biochemical, yield and fruit quality characteristics of tomato under drought stress

Desert endophytic fungi improve reproductive, morphological, biochemical, yield and fruit quality characteristics of tomato under drought stress

Pattern of ROS generation and interconversion on wet stigmas in basal and divergent angiosperms

Soil drought during the development of cotton ovule destroyed the antioxidant balance of cotton pistil to hinder the ovule formation

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